The popular Moravanka brass band performs at the fair. Vasek Pivoňka, the bandleader of the local brass band Kulatěnky, which broke up, decides to put the band back together. The village musicians are sceptical at first, but later they start rehearsing with vigour. Standa, a Prague resident who is working in a pig farm to cure his nerves, helps them to organise the concert. He really likes Evica Kocourková, but her father keeps an eye on her. Young Šišák tries to charm the teacher Olina. Before the performance can begin, the band must succeed before the cultural committee. However, they fail to do so. The disappointed musicians play for themselves at the station and suddenly they are successful. Standa comes up with an idea how to push Kulatěnka through without the permission of the commission. A concert of Moravanka is being prepared in nearby Nechvalin.

It tells the story of a young man who was turned into a donkey by curiosity and a fatal mistake. While the hero despairs and does not know how to return to human form, we can observe through his eyes the society that surrounds him. The television fairy tale of screenwriter Jiří Bednář and director František Filip alternates dramatic tension with comic moments.

Prince Dominik torments his father with his aversion to marriage so much that the king has him locked up in an old tower. In prison, the prince is discovered by the water nymph Aneta, who is enchanted by the young man's beauty. She boasts about her latest discovery to her friend, the genie Létavec. However, he objects to the nymph, saying that the most beautiful creature is the emperor's daughter, Princess Budúr, who rejects all suitors. The magical beings bring their favorites together so they can compare their charms. However, they have no idea that this fateful meeting will cause Prince Dominik and Princess Budúr to fall in love.