Seventeen year-old Cassidy Chapman knows that she's not dead. Problem is, everyone else thinks she is the youngest of the Chapman triplets, Jessica. The only people who believe Cassidy are her new friend Pacey Townson, and the middle triplet, Nora, who Cassidy believes knows more than she is telling. In fact, Cassidy believes that Nora is behind everything, and doesn't intend for Cassidy to survive.