On the surface, Kit Caldwell has it all. A senior in college with her future ahead of her, lots of friends, lots of parties - not to mention also having the eye of Tommy, the star quarterback of the football team. But underneath, Kit's life is a charade, built on a foundation of secrets and lies, including one so dark it threatens to tear her world apart: her twin sister, Cat, was kidnapped when they were both seven, never to be heard from again. That is, until one dark Halloween night. But is it really Cat? Or is it someone else, someone playing a sinister and deadly game? To save herself from imminent danger, Kit, with the help of Tommy and her friends, is forced to go back in time and confront her own personal demons, as she finally discovers what really happened to Cat all those years ago.