Lucy's always looked up to her big sister, Olivia. But then, Olivia starts to change and Lucy discovers that her sister is not just growing up: she’s struggling with an eating disorder. As her family focused on helping Livvy, Lucy has to figure out middle school, making friends, and dealing with a mean classmate all on her own. But with time, work, and a dose of self-love, both sisters begin to heal. Soon enough, Olivia and Lucy find their way back to each other—because sisters are the one friend you can never leave behind.