A close film adaptation of Johann Strauss' "Fledermaus". Notary Falke uses Prince Orlofsky's ball, at which the distinguished gentlemen of Viennese society enjoy themselves with the opera's ballet girls, to take revenge on Dr. Eisenstein, who once embarrassed him after a drinking bout. Falke also invites Eisenstein's wife Rosalinde. During the lavish party, Eisenstein courts his own wife, who is disguised as a Hungarian countess. In the morning, he hurries to prison to serve a short sentence. His indignation is great when a Dr. Eisenstein is already sitting there. He had been taken from his wife's arms the night before. He makes a scene for Rosalinde, but she convicts him of infidelity with the Hungarian countess.

Early 18th-century Krakow: The poor student Simon works as a travelling musician in order to finance his studies, and the Polish freedom fighter Jan is on the run from Saxon troops. They meet in the carriage of Count Kovalska, where they fall in love with the Count’s daughters Laura and Bronislava.

The determined Mrs. Barbora Čápová, the owner of a goose farm in Brousilov, is trying to get her daughter married. The advertisement receives a whole box of responses, so the caring mother has plenty to choose from. Pavel Stehlík appears to be the most suitable candidate, and since her daughter also likes him, a famous party is held. The newlywed is not proud of the fact that he is literally drowning in debt. Moreover, he gets along suspiciously well with his father-in-law, and the two have all sorts of falling out. After some time, they set off on a trip to Prague together. As if by chance, Mrs. Barbora is on the same trip that same day - and meets her husband at a variety show, where she went with an old acquaintance. She promises cruel revenge on the unfaithful man, but her plans are thwarted by a completely unexpected event...

Two young composers offer their operetta in vain - it is rejected before anyone reads it. By a coincidence, when its text ends up in the wrong briefcase, it ends up with a popular singer who, on the contrary, likes it very much, but has no idea who wrote the play... The search for the authors, personality confusion and budding love become the main plot elements of this pleasantly naive film, where there is constant singing.

A young princess arrives at her estate. She is bored by the welcoming ceremony and is quite happy to hear about the rebellious miller who refused to come to the castle. He lives with his mother and ward Hanička in an old mill. The miller is exempt from work, but he is obliged, if the lordship requests it, to accompany her with a lantern to the forest castle. The princess likes the miller and therefore uses his right...

The famous operetta singer Jarmila Kšírová tries to hide her marital status from the sensationalist public. The heroine of the story is the star of the big operetta scene Soňa Jansová. For advertising reasons, it is claimed that she is still single and that she even avoids men. In reality, however, the operetta soubrette has been happily married to Dr. Karel Svoboda for several years and even has a four-year-old daughter, Evička. Her husband pretends to be only her legal representative and only sneaks into her apartment secretly...

The determined Mrs. Barbora Čápová, the owner of a goose farm in Brousilov, is trying to get her daughter married. The advertisement receives a whole box of responses, so the caring mother has plenty to choose from. Pavel Stehlík appears to be the most suitable candidate, and since her daughter also likes him, a famous party is held. The newlywed is not proud of the fact that he is literally drowning in debt. Moreover, he gets along suspiciously well with his father-in-law, and the two have all sorts of falling out. After some time, they set off on a trip to Prague together. As if by chance, Mrs. Barbora is on the same trip that same day - and meets her husband at a variety show, where she went with an old acquaintance. She promises cruel revenge on the unfaithful man, but her plans are thwarted by a completely unexpected event...