Five high school friends skip class in hopes of finding the perfect spot to party. They chose the wrong place. Against all warnings, they break into an abandoned mental hospital, notorious for reports of ghost sightings, satanic rituals and demon possessions. Now, armed only with a camera, they are trapped inside, haunted and hunted by something they cannot stop, reason with, or describe.

The lone survivor of the brutal Oakhurst Sanatorium Murders, suffers from severe post-traumatic dissociative disorder in a state run mental health facility. Budget-cuts lead to the transfer of the criminally-insane killer she escaped right to her hospital, while the true supernatural force behind the killings wants to finish what begun the night of the murders.