Five researchers emerge from cryogenic slumber, only to discover they are confined within a subterranean complex. Struggling with amnesia regarding their identities and the duration of their hibernation, they gradually come to the unsettling conclusion that they might have been involved in a botched scientific experiment. As bizarre occurrences unfold, the group finds themselves being pursued by an unknown entity. Uncertain of their pursuer’s identity or motives, the scientists start to suspect that the threat might be coming from within their own ranks.