When 16 year old Annie Tuttle takes a walk at her lake front home she spots a young girl standing on the ice covered lake. As Lucy falls through the ice Annie hurries to rescue her, and sees a figure at the center of the lake; the figure seems to shimmer and disappear before her eyes. Nine years later Annie is happily married to Jack Cole. Annie gets a letter which reads: "It's going to kill you. Come alone". The letter leads her to the Granger Institute and Lucy Talbot - the girl from the lake. Lucy explains that the Glimmer will never let her live. Outside, Annie meets up with Gabe, the local deputy and a former boyfriend. In Lucy's room, Annie and Gabe discover two pictures and a page torn from a book dating back to 1698; in them, the figure of Eldridge Peck appears; a man executed for being a witch. Meanwhile, Annie has discovered a link between the Peck family and her husband Jack. Annie must race against time to save herself and her unborn child from the Glimmer.