The invitation to the imperial court still hasn't arrived. Money is short, and Devilius manipulates the innkeeper to demand the hotel bill from Amadeus' father, Leopold, in advance. Leopold has no other option but to return to Salzburg. Amadeus attempts to meet the Empress during a visit to the opera, without success. As the Mozarts make their way home in an oxcart, the invitation to the imperial court finally arrives! In a race against time, the misled innkeeper tries to reach the Mozarts to bring them back.
Amadeus and his dog, Pumperl, fetch some medicine for Amadeus' sister Nannerl. On the way, Pumperl follows another dog and disappears. While Amadeus searches for Pumperl, he stumbles on a performing bear at the marketplace. He receives gold coins (ducats) from the crowd for his violin playing. Devillius, green with envy, devises a plan to catapult his nephew Mario into Amadeus' place. But Mario's fiddling instead causes the bear to flee through the alleys of Vienna. Eventually, Amadeus' violin playing prevents even worse mishaps. The Music: "Bassoon Concerto in B Major" K.
Amadeus, tired of practicing on a "silent piano" in his hotel room, is thrilled to learn that a grand piano sits in the ballroom for a "Russian Evening." While he secretly plays the piano, one of the keys breaks. Devilius wants to impress the Russian nobility and manages to put the pianist, due to perform that night, out of action. In the meantime, Amadeus and Nannerl, with the help of Pumperl, try to earn some money on the street so they can buy a new key from the piano maker. Can they pull it off in time for the special event? Who will perform that evening?
The empress invites the Mozarts to the imperial court again. The children persuade two of the hotel employees to pose as their parents (who can't be reached) and accompany them to the court. This leads to problems when the real parents hear about the invitation and rush to the palace. In the meantime, Amadeus and Nannerl enjoy sliding on the polished floors of the palace with Marie Antoinette, the empress' youngest daughter. Will Devilius stop another one of Amadeus' successes, or will he slip up? The Music: "Organ Fantasy in F Minor" K. 608; et al.
Nannerl collapses during a concert at the palace, but no one knows why. When someone mentions smallpox, Devilius pretends to fall ill. Amadeus thinks the amulet Nannerl lost during the concert at the palace will help her regain her health and sneaks into the palace to look for it. Meanwhile, Devilius enjoys the attention he receives from his accomplices Mario and Monti. Does Nannerl really have smallpox? Will the amulet heal her? And will anyone discover Devilius' feigned sickness? The Music: "Violin Sonata in F" K. 376; "Menuett in D Major" K. 94; et al.
Princess Antoinette persuades Amadeus to uncover the secret of Ybbs, a nearby monastery. Amadeus convinces his parents to visit Ybbs on their way back home to Salzburg, where he immediately starts looking for the secret. Devilius and his gang get lost in a heavy snowfall and also end up at the monastery. They quietly creep around and cause confusion among the monks. The secret is finally revealed as a beautiful organ hidden behind a wall. Amadeus presents a small concert on the organ and Devilius, Monti and Mario flee from the monks in a mad rush - on the backs of two pigs!