At the start of summer, a lonely and thoughtful teenager, Evie Boyd, sees a group of girls in the park and is immediately caught by their freedom and dangerous aura of abandon. Soon, she is in thrall to Suzanne, a mesmerizing older girl, and is drawn into the circle of a soon-to-be infamous cult and the man who is its charismatic leader. Hidden in the hills, their sprawling ranch is eerie and run down, but to Evie, it is exotic and thrilling --- a place where she feels desperate to be accepted. As she spends more time away from her mother and the rhythms of her daily life, and as her obsession with Suzanne intensifies, Evie does not realize she is coming closer and closer to unthinkable violence.

At the start of summer, a lonely and thoughtful teenager, Evie Boyd, sees a group of girls in the park and is immediately caught by their freedom and dangerous aura of abandon. Soon, she is in thrall to Suzanne, a mesmerizing older girl, and is drawn into the circle of a soon-to-be infamous cult and the man who is its charismatic leader. Hidden in the hills, their sprawling ranch is eerie and run down, but to Evie, it is exotic and thrilling --- a place where she feels desperate to be accepted. As she spends more time away from her mother and the rhythms of her daily life, and as her obsession with Suzanne intensifies, Evie does not realize she is coming closer and closer to unthinkable violence.