A group of tired commuters have caught the last train home, ready to hop into their beds for the night. However, their train soon veers off-course and crashes into an abandoned tunnel. The three surviving commuters; withdrawn mother Yi Ling, her son Luca

一群疲惫不堪的通勤者搭上了回家的末班火车，准备上床睡觉。然而，他们的火车很快就偏离了轨道，撞进了一条废弃的隧道。三位幸存的通勤者——性格孤僻的母亲伊玲、她的儿子卢卡斯和学生珍妮丝，被迫团结起来，熬过这