When a man purchases a camera from a pawnshop he discovers horrific footage of a 21st birthday celebration gone horribly wrong. Five girls out for a night of drunken shenanigans break into an abandoned warehouse, their merriment soon vanishes when they encounter three vagrants hell-bent on violence and mayhem. The brutality of the vagrants awakens a dormant and malevolent force within the building itself, a force that that no one, not victim nor perpetrator, can fathom or stop! Entombed in the labyrinth-like building, each character is caught in a struggle against an evil entity with a thirst for flesh and souls!