It's wrong to conform due to societal pressure.
Erica, who plays the tuba, transfers to a new high school, where she knows that being thin is what makes people popular.
Erica wants to make friends.
Erica joins the school band and meets other students who share her love of music.
Erica stops eating, so she'll lose weight and get noticed by popular students.
Erica makes many friends in the band and goes on a trip to a band competition out of state.
Erica makes friends with the popular crowd but gets sent to a psychologist when her parents learn she has an eating disorder.