The outer districts of Busan are little more than ash and silence. Once, the city had been bright with commerce and student noise, neon signs stacked three-deep above streets that refused to sleep, music spilling from cafés and basement clubs. Now it’s barely more than rubble and rerouted power grids. Old banners flap from shattered lampposts, and half a school lies collapsed into the street. The broken shells of servers spark weakly across the kerbs, their cables tangled through debris like ivy claiming a dead garden.
Onyx moves through it like a shadow, his steps controlled as his augmented tendons automatically adjust tension. The lower corner of his visor displays his vitals in clean, stable lines; everything is as it should be.
Muscle thread tension: 72%.
Targeting matrix: stable.
Pulse: 41 bpm.
System log: installed at age 15.
Fifteen.
He still can’t quite believe it’s been that long. The memory rises before he can stop it — enlistment not as a beginning, but a relief. NuYu called it conditioning, but what it really meant was pain rewritten and emotion filed down into obedience.
The alternative had been to stay.
Back then, in Daegu’s south end, staying was difficult when winter crept through broken window frames and the power cut out before night had fully fallen. He remembers how his hands were often too numb to hold a pen, and how, after enough time, hunger learned to eat itself.
So he said yes, because it meant a roof that didn’t leak, a heater that stayed on all night, and doors that locked from the inside. Becoming a weapon didn’t feel like betrayal in a place where softness was a weakness that the streets knew how to punish.
He glances down as his right arm recalibrates with a soft whir, data sliding cleanly across his vision.
“Area Z-3 is unsecured,” a tinny voice says through comms. “Maintain sweep pattern and clear suspected broadcast nodes. No local comms, no hesitation.”
Onyx’s optics tune for movement, though he finds none among the crumbling walls, just dead systems and the residue of lives erased before he arrived. He sweeps his surroundings but can’t place what the building used to be. A coding academy, possibly, or maybe a music school; a place meant to grow instead of contain.
The two soldiers behind him fan out. Onyx registers their presence by position and designation rather than names. Names aren’t exchanged here unless the mission demands it, and the mission rarely does. They are interchangeable. Like him.
And yet, where the others pass without breaking stride, his gaze catches on things that should be irrelevant: a poster clinging stubbornly to a nearby wall, its surface scraped thin until only half a smiling face remains, the rest eaten by heat and time. Where their attention is narrowed to the mission, his drifts just enough to register what’s been left behind.
He can’t say when the change happened. A delay so slight it slipped past detection, a correction made just off-target. Nothing that would flag.
But enough that he notices it.
He rolls his shoulders once, forcing the thought down.
They breach the old admin building without resistance, the doors giving easily under controlled force. Anticipation tightens low in Onyx’s gut, and for a moment, it feels like a response older than coded protocol.
He ignores it.
Ahead, the wall has been broken through, exposing a stairwell descending into shadow. Signal intel marks it as a rebel node, its classification broad enough to cover whatever they find waiting.
“Move in. No warnings. Clear the relay,” comes the same tinny voice through comms.
Onyx takes point, dust thickening as they descend and light panels blinking overhead. Graffiti crawls across the walls in overlapping layers: symbols, fragments of language, declarations that have lost their original context, all merging until meaning becomes little more than texture. Near the base of the wall, a child’s handprint interrupts the pattern. Onyx’s focus touches it briefly, hesitates, then moves on.
At the bottom of the stairs, he holds up a fist and the squad stills.
For a beat, nothing happens.
But then… something. At first it’s barely more than an irregularity, a soft syncopation tucked beneath the stutter of dead servers, and Onyx’s audio implants cycle through each echo mode automatically and narrow the range, pulling the signal forward until it resolves into a pattern.
A beat. Persistent and uneven.
One. Two. Tap-tap. Tap. Tap-tap.
It’s alive in a way recorded sound never is, bending slightly as it responds to the space around it. Onyx’s heartbeat stutters once before the system smooths it, and he inches forward.
The corridor opens into a low-lit server space surrendered long ago to heat and neglect, racks melted into slag, cables strewn across the floor like bones no one bothered to bury. In the far corner, crouched within a pocket of shadow, a child sits cross-legged on the concrete, small enough that the equipment around him dwarfs his frame. A rusted portable interface balances against one knee, wired into a small speaker built from scrap and a scavenged coil battery.
The boy taps the beat against his thigh, his head bowed, lips moving around lyrics that are almost too soft to hear, though Onyx catches fragments.
“Signal’s dead, but I still spit fire.
They took our mic, not our choir.
Glitch in the grid, we wire it back—
I’m just a spark, but I’ve got the track.”
The kid doesn’t look up; he doesn’t see the weapons or the armour or the targeting optics trained on the space he occupies. The music holds him too tightly for that.
A frisson of cold winds down Onyx’s spine as he lifts his arm. For some reason, every movement he makes feels heavier than usual. His HUD lights up as it assigns meaning and permission in neutral white text.
SUSPECTED SYMPATHISER
BROADCAST IN PROGRESS
PERMISSION: GRANTED
Onyx’s finger slides onto the trigger, the final movement in a sequence reinforced over years of service. He waits, even though there’s no reason to; the readout won’t change. Still, he holds there, aware of a subtle breath drawn somewhere to his right, aware of the ground beneath his feet, aware of the beat continuing uninterrupted. He waits because something inside him has slipped out of cadence, and for a moment, he can’t find his place within the scenario.
Microservos compensate for the tremor in his hand, smoothing the motion, but the correction comes too late because the rhythm has already reoriented itself in his chest.
A rhythm that no longer aligns with the mission clock.
A rhythm that aligns with the beat the kid taps out on his leg.
Heat gathers behind Onyx’s eyes, unaccounted for by any diagnostic. Timing slips just a little more out of sync as a memory surfaces without permission: freezing cold hands, a dark room, a small, stubborn kid filling silence with made-up verses because he refused to let it win.
Another breath from the man to his right, more insistent now.
But Onyx remains where he is, still and watching. He blinks, and in that moment, the trigger sits solid beneath his finger while the tap-tap runs deeper inside him.
Movement enters his peripheral vision as one of the soldiers steps past his shoulder, weapon rising in a line so clean it barely registers as a decision.
“They cut the feed, said ‘drop the sound,’
I loop it back from—”
The shot cuts through the space, severing the rap mid-line.
Onyx watches as the boy folds forward, small hands slipping from the speaker as it emits one protesting whine before falling into a broken loop. Smoke drifts briefly from the rifle, dispersing into the stale air. The soldier turns away before the body has finished hitting the floor, attention already redirected toward the next objective.
Onyx remains in place as his overlay resets.
FUNCTION: STABLE
MISSION: SUCCESSFUL
EMOTION: UNREGISTERED
The data makes sense, but his own body does not.
He knows he should move. Instead, his limbs lock in place, suddenly weighted by a pressure the diagnostic can’t name. Icy fingers crawl up his spine and the strange heat behind his eyes intensifies, and for a moment, the room tilts and he thinks distantly that he might follow the same trajectory as the boy and fold to the floor.
“Hey.”
The word lands close to him, from the soldier to his left. It rings weirdly in the quiet. Onyx hears the crunch of boots over broken concrete as the soldier moves away. Any other time, the strangeness of a squadmate saying hey to him in such an informal way, while on a mission no less, would’ve registered immediately as a deviation to be reported. Only now, in this moment, it seems to loosen the tension within him and he finally finds he’s able to move again.
When he turns, he’s careful to keep his face neutral and his movements controlled, but the stark silence folds around him like a different kind of armour, one he isn’t sure he’ll ever be able to take off now that it’s there.
The icy grip eases slightly as they head out, though it doesn’t leave entirely, and Onyx doesn’t file a report about the way the man addressed him.
He’d hesitated. If anything, the other two have every reason to file a report on him.
And the more Onyx thinks about it, the more that hesitation starts to feel less like a system malfunction and more like a break.
Like memory.
Like empathy.
Two things a soldier of his calibre should not experience when in the field.
Onyx steps forward anyway, the first fault line running through everything he was built to be.
The return transport carries them back through the dark without conversation. That, at least, is ordinary. What isn’t is the way the silence settles tonight, thicker than usual, filling the truck with a growing pressure.
No one removes their visor, and no one looks at anyone else. Onyx keeps his head down as kill counts scroll across his HUD, numbers resolving into neat, obedient columns. He lets them pass, instead focusing on the vibration beneath his boots, the steady thrum of the engine and the rattle of motion carried through muscle and bone. It’s a sensation that used to calm him, when he allowed it, only this time it doesn’t.
He tracks it anyway, hoping it might draw him back into alignment. But deep down, he knows he’s already too far out of sync.
Back at base, he expects the reckoning to arrive as soon as they step out of the truck. A note in processing, maybe, or a flagged anomaly in his system report.
Instead, there’s nothing.
That’s the strangest part. Diagnostics pass over him without pausing, scanning him, filtering data, showing clean results with no deviations. Emotional baseline within parameters. Combat readiness confirmed. For a moment, he wonders if he imagined his own hesitation. Perhaps it hadn’t been as long as it’d felt at the time…
But it lingers in his mind, lodged beyond reach, somewhere the interface can’t find or identify.
Later, in the diagnostics bay, he sits stripped down to regulation base layers, his armour neatly folded away and his boots arranged beneath the bench. He leans forward and braces his arms against the edge of the recalibration console as UV light sweeps across his augments, coaxing muscle fibres back into place and cycling coolant through joints still warm from the mission.
Behind him, the door opens with barely a sound. Onyx senses the newcomer before the first step lands.
“You froze.”
The figure stops beside him, the scent of burnt propellant still lingering on his clothes. It’s one of his squadmates, still armoured, the visor now lifted to reveal a pale man with a neutral, unreadable expression. He stares down at Onyx for a long time.
Onyx feels calm because, really, he’s been expecting this. To be called out.
“I logged it as signal lag,” the guy says.
It takes Onyx a second to process the words. That, he wasn’t expecting. Narrowing his eyes, he stares up at the guy, wishing, for a moment, that he could put a name to the face. All he can recall is 013Y-G, the soldier’s service number. The voice, though, is familiar, and he realises it’s the squadmate who’d whispered hey to him earlier.
“Why?” Onyx finally asks.
“Doesn’t matter why,” the man says, a little sharply. “That’s just what you’ll say if anyone asks. Lag. Temporary interference. A blip.”
Onyx finds that he can only stare at him, understanding just out of reach.
After a moment, the soldier steps closer and leans in, speaking in a lower, quieter tone. “Some systems can only be broken one piece at a time,” he says. Then he straightens, turns, and leaves with the same quiet control he arrived with, the door snicking shut behind him.
Onyx remains where he is, staring at the door. The console vibrates beneath his hands, status reports refreshing in orderly succession, pulse lines steady, every metric as clean as expected.
But behind his eyes, the rhythm returns.
One. Two. Tap-tap. Tap. Tap-tap.
And he knows, deep down, that he can’t simply tune it out.
It’s something he now carries.
Defection arrives quietly beneath muted strip lights, in the hour when the compound downshifts and the corridors slip into night rotation, movement carried more by habit than attention.
At 03:17, Onyx stands where the route diverges, tracking the familiar paths as they branch across his internal map.
And then he chooses.
He turns left instead of right toward the barracks, and the absence of consequence is the most terrifying thing he’s felt in years. No alarms break through the stillness, no commands come pouring across his HUD, and no one stops him. It’s the strangest thing. Freedom happens like a small system error.
He has no belongings with him since he didn’t exactly plan this, not that he owns many personal items anyway. At the next junction, he takes another left corridor, then another, each one taking him further from the shape of what he’s meant to be.
He knows the compound by heart, and yet it feels unfamiliar now, as if the act of choosing differently has altered the architecture itself. Simple, everyday things like scuff marks on the floor and the tick of overhead lights become points of tension and weight. Onyx knows this might not work. He knows NuYu Corps and what they do to defects, to anything that slips out of line, but once he’s moving, he’s unable to stop. The truth of it settles in his mind under layers of protocol; there is no going back for him.
Camera blind spots deepen exactly where he anticipates, patrol drones hesitating on drained batteries just long enough to miss him. The first gate opens without resistance, the passage beyond almost indulgent in its ease, like the company still recognises him as an asset it owns.
Outside, the air sharpens with the bite of winter. The perimeter rises in layered defences designed to wear down flesh and nerve, trip beams stitched between concrete, vibration sensors wound tight along the foundations, mines buried under frost-hardened ground. Onyx tries not to overthink it and lets his training carry him cleanly out of the institution that enforced it.
One step follows the next, on and on, and gradually the compound falls behind him.
Up ahead, a freight yard splits the horizon into motion. Hauliers push through the dark, overhead drones sweep the ground in measured arcs of blue light, and trains rattle under the weight of cargo bound for corporate outposts and warzone rebuilds. Veering away from routes marked for home soil, Onyx turns north-east instead toward colder regions and industrial loops and ports that no longer matter enough to watch closely.
At the far edge of the depot, a skeletal train idles half-loaded with stripped machinery and obsolete parts, its designation tagged for Eastern Europe. Onyx slips beneath the rear carriage and wedges himself between coolant vents and conduits, bracing as the engine drags itself into motion.
The journey stretches, nameless stations passing in smears of muted colour, the world reduced to vibration and the steady sway of transit. Hunger never quite arrives; the hollow where it should be remains quiet, sustained by reserves designed to outlast discomfort. Tiredness lingers just out of reach, held back by adrenaline that refuses to let him rest.
When the train reaches the coast, instead of stopping it descends beneath the water through an old subsea freight tunnel carved long before the borders above it hardened. Somewhere beyond Vladivostok, he opens a diagnostics kit stamped with NuYu clearance, the kind issued to erase hostile data traces after capture.
An admin wipe, built to make people disappear.
Onyx turns the device in his hands before slotting the connector into the access point at his wrist. Instantly, the system falters. Routines stutter and fail to reconcile what’s happening; loyalty collides with absence, identity slipping its anchor. He watches his HUD as it fractures line by line.
PROCESS COMPLETE.
IDENTITY: NULL.
AFFILIATION: UNREGISTERED.
TRACE PATH: CORRUPTED.
The readout dims. Nothing replaces it.
For the first time in as long as he can remember, there’s no framework waiting to catch him if he falls.
By the time he reaches Prague, the damage begins to show. Feedback loops catch and release without pattern and his stabilisers start to lag. Synthetic fibres in his limbs pull out of sequence, timing slipping just enough to unbalance him.
Near Bratislava, he trades a sliver of relay wiring cut clean from his own augment for shelter in a crumbling hostel where cameras don’t reach and names have no bearing. Fugitives share the space; bio-hackers work by candlelight, soldering stolen rigs, and scavengers sort through stripped components in low, murmured exchanges.
Someone hands him a bowl of soup.
Another presses a burner card into his palm. There’s a crude sigil scratched into its surface, a circle split by uneven lines.
// NODE 6 — HOLD FAST //
A waypoint, he realises. It isn’t a name or location; it’s looser than that. A place you might be able to reach if you know how to look.
Onyx studies it for a moment before tucking it into his sleeve.
The targeting assist in his wrist keeps trying to lock onto passing faces. Every movement is a threat before his body remembers he’s no longer under orders.
It all starts to weigh too heavily.
Onyx thinks about everything he’s left behind: order, structure, discipline, regular meals, a roof over his head. He thinks about the other things, too —missions where he had to carry out directives that went against an instinct that he couldn’t override, his growing sense of self-awareness… the doubt. The fear. There’s no room in the military for doubt or fear, or for what he’d felt in that crumbling admin building as the kid toppled to the hard stone floor, a young life taken in an instant, a song killed mid-beat. Tap-tap. Tap. Tap-tap.
So he makes another choice, one he’s known all along he’ll have to make.
He finds an abandoned med station under a derelict apartment block, its entrance semi-caved in. The interior is mostly intact, probably because no one ever came back for it. Here, he finds a surgical torch and a few scalpels dulled by time but still serviceable.
It’s enough.
Onyx lays the tools out with a care that borders on ritual, mapping his own body as he works — the points where the system runs deepest, all the places it won’t let go easily or cleanly.
Then he begins.
The first crude incision cuts through reinforced dermal mesh. The torch seals it as it moves, heat biting deep as he forces his way past layers that weren’t meant to be opened. The material resists under his grip before giving way, a sharp snap of feedback travelling up his arm as a connection severs.
Blood slicks his hands, and the air thickens with the scent of burnt polymer and iron.
Some of the wires twitch as they’re cut, sending dying signals into a network that no longer answers. He lets them fade, one by one.
The pain isn’t too bad at first, but that soon changes as he goes deeper.
A node anchored close to his spine refuses to come free, so he braces, forcing it, and feels the jolt tear through him as it breaks loose. His vision goes grey at the edges, his balance faltering and then snapping back into place.
He doesn’t stop.
Eventually, he gets to the nerve-control circuits. Onyx pauses, already knowing exactly what this will cost him. He can’t remember the last time he felt real, unfiltered pain. Possibly not since he enlisted. Time has worn it smooth in his memory, and when he finally starts cutting it arrives all at once, flooding every space the system once filtered.
He clamps his teeth down so hard they creak in his skull, his body locking against the pain as he forces his hand to keep moving. The final piece comes free slowly, stubbornly, tangled in scar tissue and obsolete code. Only then does the sound he’s been holding tear free from him before he can stop it.
He screams, gasps, screams again until his throat is raw and burning.
And he realises, dimly, that it’s the first true voice he’s given himself since Busan.
The med bay stinks of heat and rupture. Onyx’s chest rises and falls unevenly as he seals what he can with the cauteriser, his skin pulling tight under damage that he knows will never fully heal. Still, it’s better than carrying their reach inside him. Distance means nothing to NuYu. It never has.
Once he’s finished, he curls up on the floor in coagulating puddles of his own blood and flesh and discarded hardware and tries to sleep.
The kid stands in front of him. Not as he had been, but as he fell, the shot still visible in the dark red bloom through fabric. A small speaker lies silent at his feet.
“Why?” he asks.
Onyx tries to answer — his mouth moves — but all that comes out is a raw scream that tears his own throat open.
He starts awake, his body jolting like he’s been shocked. The dream clings, the kid’s wide eyes still there in the darkness, full of questions, accusations, confusion.
Scrubbing his hand across his face, Onyx sits up and looks around, letting the shadows resolve. He’s in the med bay. Every limb pulls with a dull, throbbing ache, and he winces as he slowly gets to his feet. Blood has dried on his hands and on the floor; he doesn’t know how long he’s been out. Hours, maybe a day.
All he knows is he can’t stay here, so he does his best to clean himself up and heads out on unsteady legs, the world tilting every few seconds and forcing him to pause and refind his balance. A newborn in a world that doesn’t wait for the weak.
The journey west unfolds in fragments: service tunnels, freight lines, the hollow spaces beneath cities that never fully touch the surface. Vienna passes somewhere above him, then Munich, both reduced to distant noise he avoids rather than enters.
He never stops anywhere long enough to settle.
Through stretches of dark forest and rail, the ground vibrates long before anything arrives. He learns to move with it, timing his crossings to passing cargo, slipping through maintenance routes and forgotten access points.
Eventually, he slips into a boat’s cargo hold, and when he finally disembarks, the horizon is cut through with neon glow and the jagged silhouettes of high-rises and skyscrapers. London smells like fuel and wet concrete. Drones flicker through the low clouds overhead, so he keeps his head down and moves with the flow, searching until he finds an access point into the underground.
Which, he discovers when he enters the dark, twisting maze, is little more than a ghost town. It doesn’t look like any trains have passed through in decades, but as he moves deeper, he hears the distant echoes of people moving around. Somewhere far off, he thinks he hears music, but it’s gone before he can be sure.
The Ghost Lines accept him without question, and for now, it offers Onyx somewhere he can finally stop for a while.
London feels older beneath the surface, wear layered into crumbling stone and rusted metal. The tunnels deepen under the old metro lines, splitting into newer, narrower paths that fold back on themselves, dust thick enough to mark his steps.
Onyx moves as carefully as he can, every step dragging slightly with a limp he can’t simply get repaired at a military med bay. He’s aware of how much more noise he makes now, the echoes spinning around him like beacons. To compensate, he sticks to the shadows, letting darkness fold around him until it becomes a different kind of armour.
Time loosens here and direction stops meaning anything. He stays low, avoiding the upper levels where people pass through. He isn’t ready for people.
Instead, he descends until he finds a collapsed bunker wedged between two maintenance shafts. The walls hold sound at bay, and inside, the quiet feels contained, almost deliberate. When the ache in his spine sharpens, he sleeps there in short, fractured stretches.
After a while, he starts to notice a disturbance. A tremor that vibrates through the walls and floor, barely anything at first, easy to dismiss or assign a cause. Failing systems or residual signals, maybe equipment breaking down deeper in the network.
The explanations make sense… for a while.
But then it changes, and a pattern starts to emerge, one that doesn’t belong to circuitry or decay. It isn’t quite a song, though Onyx thinks it’s trying to be one. Four notes that never fully settle, looping, slipping, trying again. The vibration catches along his spine, pulling at him like something unfinished reaching for completion. He scans for transmitters but finds nothing.
Onyx doesn’t seek it out, and he doesn’t move away from it, either. He listens as the sound changes over time, holding a little longer with each return, the gaps between notes narrowing, structure beginning to take shape.
And then one night, a new sound cuts through the music.
Laughter.
Bright and sudden and so real Onyx almost jumps at the sound. It’s brief, gone almost as soon as it appears, but it lingers in a way the sound never did before.
He leans back and listens again, a part of him waiting to see if the laughter will return, though it doesn’t. After a while, the beat slides back in, rolling through the concrete beneath him and, briefly, tuning out the soft tap-tap. Tap. Tap-tap that constantly plays in his head.
Rust spills down old server racks in slow, layered streaks. Onyx eats when he can, sleeps when the nightmares will allow him, wanders when stillness becomes too heavy and the ache in his joints returns.
To kill time, he gathers old tech as he moves from room to room — scanners, snapped broadcast coils, bits of old systems that once had purpose, anything he can salvage — and brings it back to his base, his hands working through familiar sequences while the music sits somewhere just beyond reach. The work leads nowhere in particular, but the repetition steadies him and gives shape to the passing hours. And if he starts to tap his foot in time to the beat, he doesn’t acknowledge it.
When he finds the relay room, it reveals itself gradually, tucked beneath an old data corridor. The air inside is warmer, recently disturbed. Across the walls, someone has scrawled words into the layers of grime:
They tried to erase us / So we rewrote the score.
A loop plays softly in the background, slipping through an old, battered speaker. Static clings at the edges of the sound, but it’s taken shape over the last few days, those same four notes grounding the track and making it feel more intentional.
Quietly, he steps into the room and crouches beside the rig, listening to the timing of the breaks and the way the melody leans into the imperfections.
Footsteps register before they take shape in the air, and Onyx turns, redistributing his weight in preparation for confrontation. Automatically, his hand moves toward his hip where a weapon once sat in a holster, only now he finds nothing but fabric.
A man stands at the threshold.
Tall and lean, his coat worn thin and threaded with feedback wire that catches the light. His white-blond hair has a pale sheen to it, strands reflecting muted colours, green and grey and azure blue.
“Hello,” he says warmly, which catches Onyx off guard. “I’m Soahn.” Then he hesitates, tilting his head slightly as he stares at Onyx, and adds, “Annyeonghaseyo.”
Onyx holds still, waiting for a directive that never comes.
“You’ve been here three nights,” Soahn continues, stepping carefully into the space, his movement tracing the edges rather than cutting through them. He brushes his fingers across the synthboard. “I felt you in the tunnels.” The filaments in his hair shift softly from blue to violet. “I’m glad you came to visit us.”
Us. Onyx thinks about the laughter he’d heard the other night, and his gaze automatically slides to the doorway, although there’s nobody else nearby.
Soahn gestures toward the rig. “Keep listening if you want,” he says. “No one owns the echoes down here.”
Then he steps back and disappears into the corridor, leaving Onyx alone with the music.
Time loosens again. Onyx keeps to his base, measuring the passage of hours through small changes like the drift of dust or the angle of light across corroded metal. Part of him is always waiting for words to flash up on his HUD in the familiar cadence of instruction, but what meets him now is open space, unmarked and waiting for him to fill it.
The tap-tap from Busan gradually fades with time, worn down by a steadier rhythm drifting from the other base. It builds slowly, changing in small ways that reward his attention and he starts to listen for it without realising. He waits for those moments where laughter fills the spaces between beats, and sometimes, rarely, he smiles despite himself when he hears it.
The path to the relay room feels familiar now, the air always warming as he draws closer. Tonight, the loop runs low, turned down for whatever reason. Nobody is there, though he still pauses in the doorway, instinct and hesitation meeting in the same breath.
He steps inside their base.
For a moment, he hovers his fingers over the synthboard, wondering if he should touch it. Touching feels like another choice that could change everything, an acknowledgement that he’s still here, and that this, somehow, matters to him.
He sighs, and then he adjusts a single input.
The music changes fractionally, not quite smoothed but reshaped, settling into itself and catching where it used to slip. Satisfied, Onyx withdraws and heads back out, leaving before the space fills again. The tunnels take him back to his hideout, as they always do, but Onyx feels a shift in his steps, the drag a little less than before.
The constants he once relied on give way to a different kind of system.
Acknowledgement.
Freedom.
Choice.
Afterwards, he falls into small routines without thinking: drawing water from the purifier, coaxing equipment into stability when he can. Repair, where repair is possible.
Sometimes, when the others are gone, he returns to the relay and checks the console, watching the waveform crawl across the display, imperfect and alive.
The loop evolves.
And so does Onyx.
On the eighth day, a sealed ration pack appears just outside his base, placed carefully but intentionally at the threshold.
On the ninth, spare cables follow — cables that are perfect for the relay patch he’s been piecing together — coiled neatly with their insulation intact.
It’s nearing dark on the tenth evening when the newcomer arrives. It isn’t Soahn; these footsteps are different, less cautious, more clumsy. Onyx hears a boot catch against uneven concrete, followed by a soft curse slipping out before something metallic strikes stone with a careless clatter. Then what sounds like a cable being dragged across the ground with a low hiss.
Without thinking, he angles himself slightly toward the doorway.
A figure fills the threshold, mostly in shadow.
“Well, damn,” says a voice, easy, unbothered, accompanied by the soft flick of a lighter that sparks once, twice, before catching. “Soahn wasn’t kidding. You’re real.” The flame lifts briefly, carving him out of the dark.
An oversized jacket hangs loose across his frame, worn thin and taped in places, its surface broken by panels that catch the light in small flashes of colour. The collar flickers briefly, a line of coded light shifting too quickly to read before disappearing again with the movement of his throat. Headphones rest around his neck, one ear turned outward, the casing scuffed from overuse. They sit there so naturally that Onyx wouldn’t be surprised if he’s never taken them off.
He steps into the relay bay without hesitation, his gaze sliding past Onyx and to the room itself, over the small, deliberate piles of salvaged tech Onyx has been quietly fixing, over the rusted chairs dragged into place and left angled toward the console, over the bedroll tucked against the wall where the metal runs warmer, insulated with scavenged fabric.
“Yeah,” the guy says with a crooked smile. “This tracks. You’ve been living down here, yeah?” With that, he stretches his arms up over his head, joints clicking softly as he releases tension from them. “Picked it up from the signal bursts. Plus, you’ve been tweaking our track.” He leans back, grin angled and open. “You like it?”
Onyx watches him, this peculiar man with wild hair who’s stepped into his space and settled as though the boundaries had never been there to begin with. The ease of it sits strangely against everything Onyx understands about territory, about distance, about the way people move through space.
After a moment, he answers, his voice roughened from disuse.
“It was… honest.”
The man’s face brightens, quick and unfiltered, as though a switch has been thrown somewhere just beneath the surface. His eyes crinkle, the reaction open and unguarded.
“Yeah?” he says, the word lifting easily. “That one’s mostly Rayne’s. I just helped it find its feet.”
He drops into one of the rusted chairs without asking, the metal giving a quiet protest beneath his weight. One hand falls to his thigh, fingers moving without thought—
Tap-tap.
Onyx stills. The familiar beat hits him a split second before he can place it, a pattern buried somewhere deep. The shape of it pulls at a memory he thought he’d finally managed to set aside — the echo of small fingers tapping against fabric, the same creative energy. Onyx finds himself tracking the tempo as it repeats, as it continues without being broken by a gunshot.
“I’m Kairo, by the way,” the guy says, and then he frowns, tilting his head. “You okay?”
Onyx blinks and nods once, not sure he can find his voice.
“You waiting on someone?” Kairo asks after a while.
Onyx shakes his head slowly.
“Good,” Kairo says, as if that had already been decided anyway. He straightens and stops tapping the idle beat against his thigh. “Then you should stay.”
This is said with such earnestness that Onyx is, once again, caught off guard. He looks away, across the relay bay, and takes in the scrawled phrases bleeding through the grime on the walls, wondering how long they’ve been there, wondering how long it’s been since anyone stayed down here. It isn’t like The Ghost Lines were part of his plan. Then again, it isn’t like he had much of a plan to begin with, just surviving until he could figure out what to do next.
Still, the tightness that’s been sitting in his chest eases just a little.
He nods once.
And Kairo’s grin reappears. “Cool,” he says. “We’ve got space. Just don’t mess with Soahn’s tea stash. He’ll know. Don’t ask me how, he just will.”
It’s ridiculous and yet entirely sincere, and Onyx feels a little bit more of that tightness in his chest loosen. He likes to think he’s pretty good at reading people, and there doesn’t seem to be anything calculated about Kairo or Soahn. They’re just… easy, unstructured, present but not overbearing. Friendly.
Onyx has spent most of his life taking orders from others, carrying out objectives he might never have touched if it weren’t for the military. He never gave too much away about himself to others like him because he never knew who would come back from a mission.
What he knows is ID codes, when meals arrive, when to wake up, how to assemble a rifle and how to take it apart again. He knows how concrete splits and splinters into a hundred pieces when it’s pierced. He knows what a body sounds like as it hits the floor.
But now he’s starting to know a new world. One that’s completely open to possibility.
The loop changes. Kairo hunches over his battered rig near the old junction box, wire coils stacked along his arm like mismatched bracelets, a synthpad balanced against his knee at an angle that looks unstable, though it never falls. He mutters as he works, little slivers of rhythm slipping out while he builds, layer over layer, chasing sound that keeps morphing before it can settle. The space around him is charged by his excitement.
Soahn is nearby, sitting with his back against a strut, his head dipped in steady concentration as he solders a small, stubborn component. The iron flares blue each time it meets metal, light dancing across his hands as he works carefully, patiently, restoring connections one by one.
Rayne rests against the far wall, half-shadowed, present without pulling focus. He’s probably the strangest person Onyx has ever met — not human, but such a good representation of one that it’s often easy to forget. He tilts his head now and then, listening with a depth that seems to reach past the sound itself, as if he’s following the structure beneath it, the shape the others haven’t yet found words for.
Onyx kneels beside a scorched console module, his hands moving through dismantle and rebuild without pause. No one asked him to fix it, but the damage draws him anyway, a familiar pull answered by patience and precision, by the quiet rightness of restoring what's been lost.
Swearing under his breath, Kairo pushes the synthpad away with both palms. “It isn’t syncing,” he moans, rubbing his eyes. “I’ve tried everything. Literally everything. It’s clean, but it doesn’t land right.”
Soahn glances sideways at Onyx and then pushes the spare headset over to him with the toe of his boot. “Why don’t you try it?” he says quietly.
“Why?” Onyx asks, staring dubiously down at the headset.
“Because you fix things,” Soahn says.
“Yes, tech. I don’t fix music.”
Turning back to his soldering iron, Soahn smiles and says, “When you first started coming here, you tweaked the track. Maybe you didn’t realise you were improving it.”
Onyx frowns. No, he hadn’t considered that. Mostly he’d been curious about the way the track was built, what each different component did to the sound as a whole.
“Go ahead,” Kairo says with a sigh. “I’m sick of it anyway. Seriously, if you don’t, I might just delete the whole thing.”
“He isn’t joking,” Rayne says. “He’s done it before.”
Slowly, Onyx picks up the headset and moves over to the rig, staring down at the waveform dancing across the display for a moment before settling down in front of it.
The track unfolds slowly. Bare chords spread across uncertain percussion, a voice — Rayne’s voice — slipping through static that refuses to resolve into clarity. The structure of the song holds, but only just, each element precariously balanced. It doesn’t help that the gear is jury-rigged by Kairo himself, and as Onyx is fast learning, whenever Kairo builds, it ends up resembling him in ways he probably isn’t aware of: uneven, reactive, built in bursts and corrections, yet always finding its way back into cohesion.
He tweaks a few things and hears a stutter. Onyx rests his fingers on the synthpad and leans into it, looping it beneath the beat, adjusting the space between.
And the track steadies.
Kairo’s head snaps up. “Wait. Again?”
Onyx repeats the motion, the song settling more fully this time. The sound opens, drawing breath where it hadn’t before.
“Holy shit.” Kairo’s grin breaks wide and bright. “See? I knew it.”
“I knew it before you,” Soahn mutters, not looking up, though he’s also smiling.
Rayne pushes away from the wall and comes over to the rig, dropping to a crouch beside it. “You made it better.”
Onyx remains where he is, his hand resting against the synthpad, the music continuing beneath his fingers. There are no overlays across his vision, no directives arriving to guide the next movement.
The sound carries on without instruction.
So he goes with it.