Over Thanksgiving weekend, all but five students in an old Manhattan building that's now a college dormitory leave for home: staying on one floor are roommates Lauren, Melina, and Alison, plus her boyfriend Diego and Grant, a loner in a room down the hall. Lauren's been seeing things in her bathroom: a silent child of about six. Diego has written a paper on parapsychology, so he holds a séance with the disbelieving co-eds. Something goes awry, because bad things start to happen and the students'...