Lucy worries about how close her daughter Evelyn is with her best friend Jenna. When Jenna’s mother is murdered, Lucy allows Jenna to move in with them so she can finish her senior year. But Evelyn and Jenna’s relationship turns weirder, making Lucy feel like she’s being pushed out of Evelyn’s life. Eventually, she fears Jenna may be obsessed and may even have killed her own mother. And after a high school boy is found murdered, Lucy must face the shocking truth.