People from all walks of life have been invited to a special screening in an isolated movie theatre, several of the attendance are disgusted by the picture, a brutal stalk and slash flick that centres around demonic possession and graphic murder. Meanwhile a young girl who cut her face on a display mask in the foyer begins to undergo a hideous transformation. She contaminates her companion and panic spreads around the cinema. In terror everyone rushes for the exits only to discover that they have been walled in. As the evil spreads, events escalate into an orgy of bloodshed and madness, climaxing in a crescendo of violence.