Still haunted by the events from four years earlier when her childhood friend, Michael, was taken by an evil entity in front of her, Siena resumes life as a normal teenager back in Banff. She is smart and resilient but has one weakness: Zach Barlow, who is unsettling, exciting, and dangerous. The discovery of a letter left by her deceased grandmother sets off unprecedented events accompanied by Zach's dark revelation that will transcend her into another world - a world that might uncover the terrible truth of what happened to Michael.