Elfie Oster is ready to leave Cottonwood Elementary. She doesn’t have any friends at the school and she’s tired of having to do group projects all by herself. It doesn’t help that her super popular cousin, Jenna, whom everyone likes, is also in Cottonwood — and also not Elfie’s friend. Thankfully, she’s been admitted at Hampshire Academy, a swanky private school where she knows everything will be different. Unfortunately, after a misunderstanding, Elfie is swiftly expelled from Hampshire and has to return to Cottonwood.