Amadeus prepares a composition for the Golden Needle of Salzburg competition. The ambitious Devilius and conniving Monti the Rat want Devilius' nephew, Mario, to win the prize instead. With the help of a pocket watch and a stolen Mozart melody, they manage to make Amadeus look like a thief and plagiarist. In a spooky graveyard scene, Amadeus and his friend finally force a confession from Mario.