Nannerl Mozart, Wolfgang Amadeus Mozart's sister, was also a musical genius. This is the story that could have been... Nannerl Mozart's twelfth birthday wish is to become a famous composer. She's already considered a brilliant musician, touring Europe with her little brother Wolfgang and playing the clavier for queens and kings in the great courts. But Papa doesn't take her seriously as a composer and won't even teach her to play the violin or the organ. Mama usually has a list of household chores for her, and Wolfi always manages to steal everybody's attention.