一群疲惫的上班族搭上了最后一班回家的火车，准备上床睡觉。然而，他们的火车很快就偏离了轨道，撞进了一个废弃的隧道。三名幸存的通勤者;孤僻的母亲奕玲、她的儿子卢卡斯和学生珍妮丝被迫团结起来，度过黑夜，同时躲避神秘怪物的追捕……

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