This is a historical adventure film with a young heroine who appears for a time disguised as a boy. Her adventure proceeds not only through Saxony and Prussia, love and close shaves with death, it also leads straight to the heart of one of Mozart's most delightful compositions - the rondo for piano and orchestra, KV 382. But Trine always comes too late and time is running out. Trine is hunting for the musical notes for the orchestra of her orphanage in the village of Hartau in royal Saxony. She has to find him - Wolfgang Amadeus Mozart, the hero of her childhood dreams. A crazy bet drives the young girl all over Germany and from one adventure to the next.