You’re invited to Jessica’s tenth birthday bash, a night you’re sure to never forget. Ten year old Willow is an anxious mess. She just moved to New Jersey from Wisconsin, her parents are divorced, and her precociousness makes it difficult for her to make friends her own age. She gets invited to the birthday party of Jessica, the coolest and meanest girl in her class. There, she meets Lily, who she instantly shares a connection with through a mutual love of New York City and American girl dolls. Willow also meets Emily, Jessica’s partner in crime, Rebecca, an insecure girl who developed early, and Blair, the group’s personal punching bag. Jessica wields her power among the girls with malicious glee, as the party eventually ends in tears. We follow these six girls after the night of that fateful party through middle school and eventually to the night of their high school graduation. Anything can happen at Jessica’s house.