Brooke Wright has only two goals for her senior year at Charity Run High School: staying out of trouble and learning to forgive herself for her past. Forgiveness turns out to be out of reach, and problems somehow find the girl when she discovers a secret club at school that is related to the death of her best friend. She learns that members of the swim team participate in the “Imaginary Slut League,” where they score points for engaging in sexual acts with unsuspecting girls. Brooke, wracked with guilt over the death of her friend, decides to infiltrate the league, becoming one of the “nothings.” suspicious girls" to get revenge on the guy who stole her best friend. An unexpected romance complicates her plans, and her dogged pursuit of justice turns maddened as she underestimates the lengths guys will go to keep their sex club a secret.