"Buy a bag... Go home in a box."
Maggie is a film student who is plagued by strange and bizarre nightmares, but she makes good use of them and keeps a record of everything so that she can write a script for it later. But those are not her only concerns, she has to organize a film marathon with a group of other film students. Of course this will be a marathon of B movies, and in the best tradition of William Castle, the spectators are treated to some real shock effects. While preparing for this festival, the students also discover another film, The Possessor! A movie made by a movie sect. But the images in this film are very similar to Maggie's dreams and it turns out that one of the group is not us he seems.