One summer day, Grace Fairchild, the beautiful young wife of real estate mogul Alistair Calloway, vanished from the family’s lake house without a trace, leaving behind her seven-year-old daughter, Charlie, and a slew of unanswered questions.

Years later, Charlie still struggles with the dark legacy of her family name and the mystery surrounding her mother. Determined to finally let go of the past, she throws herself into life at Knollwood, the prestigious New England school she attends, and quickly becomes friends with Knollwood’s “it” crowd.

Charlie has also been tapped by the A’s—the school’s elite secret society well known for terrorizing the faculty, administration, and their enemies. To become a member of the A’s, Charlie must play The Game, a semester-long, diabolical high-stakes scavenger hunt that will jeopardize her friendships, her reputation, even her place at Knollwood.

As the dark events of past and present converge, Charlie begins to fear that she may not survive the terrible truth about her family, her school, and her own life.