After an earthquake leaves Danny trapped and alone, his claustrophobic nightmare only gets worse when something truly horrifying emerges from the fissures in the ground, forcing him to engage in a brutal fight for his life and his sanity.
一天上午,有人坠楼摔死在一辆货车上。负责查询拜访的警探博登(克里斯·梅西纳 Chris Messina 饰)来到现场后发明第一现场并不在货车停靠的职位,而是在不远处的一栋大厦。与此同时,这栋大厦的一处电梯忽然故障,悬停在20层附近,电梯中的三男两女被困。大厦保安派往的维修人 员也未能解决故障。封锁的电梯里,五人因延续被困而情感烦躁并辩说…