Walter Gilman is a grad student writing his thesis on string theory. He finds the perfect place to rent a room while finishing his work. There he meets Francis Elwood and her infant son Danny as well as an elderly neighbor named Mr. Masurewicz. While studying one night, Walter is stunned that the walls in one corner of his room are just like those that he's working on, with slants and intersections that might make inter-dimensional travel possible. The next day Francis asks Walter to watch Danny while she goes to an interview; Walter agrees to but is visited by a naked woman who looks like Francis who seduces him and scratches a pentagram on his back. Walter discovers, all too late, that a witch lives in the space behind the walls and makes the men who live in that room do her bidding...which is to kill and sacrifice young children. Walter even wakes up at the university with the Necronomicon opened to a page on sacrifice! Walter now must do all that he can to resist the spells of the witch and save Danny and Frances as well as himself!
