In a remote mountain lodge, five sorority sisters accidentally unleash an unholy entity, and must battle evil and each other to stop it from devouring mankind.

Fish has spent six years in jail. Six years alone. Six years keeping his mouth shut about the robbery, about the other men involved. The night he is released, the four men he protected with silence celebrate his freedom with a congratulatory dinner. The meal is a lavish array of sushi, served off the naked body of a beautiful young woman. The sushi girl seems catatonic, trained to ignore everything in the room, even if things become dangerous. Sure enough, the four unwieldy thieves can't help but open old wounds in an attempt to find their missing loot.

During an exclusive tour, a power breakdown inside a secret prison known as the Death House sends two agents fighting through a labyrinth of horrors while being pursued by a ruthless army of roaming inmates. As they fight to escape, the agents push toward the lowest depths of the facility where they learn a supernatural group of evil beings is their only chance for survival.