The last train out of the city never reaches its stop. Instead, a voice crackles over the intercom with a single rule: stay in your seat — if any part of you touches the floor, you die. Nine strangers watch the rule prove itself in blood. Every station brings something worse aboard, and the one passenger who seems unafraid may no longer be human. Trust runs out faster than the tracks. Six of them might live to see the next stop. The rest become part of the ride.