Cassie Kramer and her sister Allie dreamed of taking Hollywood by storm. But Allie was more beautiful, more talented, more driven. While Cassie got bit parts, Allie rose to stardom. But now her body double has been killed - and Allie herself is missing.

To the police, Cassie looks like a suspect: the jealous sister who grew sick of playing a supporting role. As the tabloids go into a frenzy, Cassie ends up on a Portland psych ward, where a sinister figure comes to her bedside, whispering about Allie. Is someone trying to help - or drive her mad?

A slew of murders makes Cassie fear for her safety and her sanity. The only way to end the nightmare is to find out what really happened to Allie. And with each discovery, Cassie realizes that no one can be trusted to keep her safe - least of all herself...