Personal trainer Cassidy Novak garners popularity and fame while starring in a hit reality show. She catches the attention of an obsessive stalker that turns her well-ordered life topsy-turvy. As Cassidy's competitors disappear in a string of murders, she teams up with Zach Gallagher, the photographer tasked to record her personal moments for a local newspaper. Is Zach trustworthy? He shadows her as easily as the stalker. Cassidy hates the bizarre rules in this guessing game, but when her stalker forces a showdown, she plays to win.