Day 1 – 23:59:59 until the loop begins.
Cass jerked awake on the locomotive floor, heart syncopated to the engine's new pulse. The cab was smaller than memory allowed: brass dials the size of coins, one throttle, one cracked windscreen that showed not tracks but a swirling ink-black horizon. A single overhead bulb flickered Morse that translated, through the Core, into one sentence:
> YOU HAVE BEEN HERE BEFORE.
Mara and Jun lay unconscious across from him, wrists cuffed to the dead-man's switch by strands of living iron. Whisper was gone—only the faint scent of crayon wax lingered.
Cass's reflection in the windscreen blinked half a second late. When it finally caught up, he saw the iris-shaped burn mark over his left eye had turned gold.
A chrome speaker crackled. The voice was his own, older, exhausted:
> "Conductor Calder, iteration 001. Welcome back to the beginning. Your predecessor's body is cooling in the coal bunker. Please dispose of it before the passengers board."
The coal bunker door hung open. Inside lay a corpse in a tattered greatcoat—gray-haired, one eye socket empty, the other glowing the same gold. A brass pocket-watch rested on the dead man's chest, frozen at 00:00:00.
Cass knelt. The watch ticked once when he touched it—then reversed direction, counting up.
A folded note protruded from the corpse's breast pocket. The handwriting was childlike but confident:
> 1. Whisper remembers.
2. Break the loop on the third sunrise.
3. The key is the crayon.
Below the note, a single red crayon stub—half used, tip sharpened to a needle.
The locomotive lurched. Outside, the same London skyline he'd watched unwrite itself now re-constituted building by building—colors seeping back into existence like watercolor bleeding onto wet paper. The sky cracked open at the same coordinates, but this time the fissure oozed gold instead of black.
Emergency klaxons wailed. The train's external speakers blared the familiar evacuation order:
> "EASTBOUND ONLY. OBSIDIAN EXPRESS. BOARD IN 7 MINUTES."
Mara stirred, eyes fluttering. Her first word—whatever it was supposed to be—died on her tongue; the Library's debt still held. Jun's mouth moved in silent curses.
Cass pocketed the crayon, then dragged his own corpse to the furnace hatch and shoved it inside. The flames roared, but instead of heat, a cascade of golden sand poured out—every second the body had lived, now freed.
The furnace door slammed shut. A new lever emerged beside the throttle:
CRAYON MODE – PULL TO SKETCH
He pulled.
The entire cab became transparent. Rails of light unfurled ahead, each sleeper a blank page waiting for ink. Cass uncapped the crayon and drew a single, deliberate line across the windscreen—cutting the horizon in half.
The line solidified into a door.
A small hand knocked from the other side. Whisper stepped through, unchanged except for the golden iris in her left eye—mirror to his own.
She held up her sketchbook. Across the page, in fresh red wax:
> "Third sunrise starts now."
Outside, the first sliver of a new sun—gold, not white—crested the rebuilt London skyline.
The train whistle screamed.
Iteration 001 began boarding.