Suzanne Perry is having a vivid nightmare. Someone is in her bedroom with her, and she can't move a muscle.She wakes, relieved to see the morning light,glad to put the nightmare behind her. Then she opens the curtains and sees a Polaroid stuck to the window. A photo of her sleeping self, taken during the night. And underneath in the words:I'M WATCHING OVER YOUHer nightmare isn't over. In fact, it's just beginning...