Nannerl Mozart's twelfth-birthday wish is to become a famous composer. She's already considered a brilliant musician, touring eighteenth-century Europe with her little brother, Wolfgang, and playing for queens and kings in the great courts. But Papa doesn't take her seriously as a composer because she is a girl, Mama usually has a list of chores for her to do, and Wolfi manages to steal everyone's attention. But Nannerl is not ready to give up her dream. Can she defy expectations and take control of her musical destiny?