Jenny McAfee's carefully planned sixth-grade year implodes when her best friend, Addie, decides to pursue popularity with the school's coolest seventh graders. Jenny believes she is fully prepared for middle school, armed with the school handbook and the certainty of her best friend, Addie, by her side. However, on the first day, Addie reveals her new ambition: to join 'The Pops,' the most popular seventh graders, a plan that leaves Jenny feeling abandoned and uncertain of her place. Jenny must navigate the treacherous social landscape of middle school without her closest ally, facing the possibility of social isolation and the loss of her identity.

The premise sets up a relatable scenario for young readers navigating the complexities of middle school friendships and social dynamics. The narrative focuses on Jenny's internal struggles as she confronts the potential loss of her best friend and her place within the school's social structure. The humor is likely derived from Jenny's earnest attempts to understand and survive the often confusing world of adolescence. The story appears to explore themes of loyalty, changing friendships, and self-discovery during a pivotal age.