在日常巡逻中，官员丹尼尔·卡特发生在一个血液浸透的身影，瘫痪了一条荒凉的路。 他把这个年轻人赶到附近一个由骨干人员组成的农村医院，只发现患者和人员正在变成不人道的事情。 随着恐怖的加剧，卡特将其他幸存者带到地下深深的医院深处，绝望地结束了噩梦，因为太晚了。

  In the middle of a routine patrol, officer Daniel Carter happens upon a blood-soaked figure limping down a deserted stretch of road. He rushes the young man to a nearby rural hospital staffed by a skeleton crew, only to discover that patients and personnel are transforming into something inhuman. As the horror intensifies, Carter leads the other survivors on a hellish voyage into the subterranean depths of the hospital in a desperate bid to end the nightmare before it's too late.