The Prague Research Institute of Air Engineering is to prepare a proposal to reduce dust in Ostrava, especially in the area where the new power plant is to be built. That is why engineers Vojtěch Spára and Jiří Zástěra will travel to Ostrava. Eva Frágnerová, a hygienist, will strongly oppose the power plant project near the housing estate.

A group of saboteurs search for a weapons cache hidden by the Nazi army. Beskydy in the summer of 1950: the StB agent Borek infiltrates a group of saboteurs hidden in the Beskydy mountains. They are preparing terrorist actions against the ongoing collectivisation in the village. The group is led by Ervín Kopal and Metud Hanák. Borek is to make contact with them, secure the saboteurs and discover a weapons depot. After many dramatic events, the task is accomplished, but at the highest cost...

The family is connected with Prague's "Kolbenka", the ČKD locomotive factory. Grandfather Antonín, already retired, son Rudolf, a master in the locomotive assembly section and grandson Antonín, a promising football player. The film also tells the story of Rudolf's daughter Vera - each generation has its own ideas about life and cannot identify with the others. The film is linked by retrospective sequences from the lives of Antonín the Elder and Rudolf, especially from the war years. It is a realistic take on working-class life, unencumbered by ideology (despite the opening dedication), featuring well-known and time-tested actors in mainly male roles.

Czech friends help refugees from Nazi Germany escape in 1939.

Radio announcer Petrícek reads the evening news in a studio. Viki, the female editor of a woman's program, is annoyed by the stereotypical information he provides as well as by the speaker's melodious voice and his heart-felt performance. Then she gets an idea for a prank. She calls the speaker from the neighboring room on the phone and pretends to be an unhappily married woman who draws all her strength to live from Petrícek's voice.

At the centre of the story is Miss Lenka Stříbrná. An attractive, but a little strange young woman. The gym teacher Vasek is shy and very clumsy with women. So he asks his friend, the editor Karel, for help. The experienced seducer willingly seizes the opportunity and tries to win Lenka for himself, but all his efforts fail due to her stubbornness. Gradually, this comedy-tinged love etude gives way to drama. It culminates at an editorial party at the Slap Dam, where all the characters in the story meet unexpectedly and editor Leden finally understands what Miss Silver's flirtation was all about.

In a wooden hut used as a canvassing center, members of a children's puppet-theatre group are rehearsing for a production about a journey to the Moon. The goings-on inside the hut and outside are being closely followed by amateur detective Pepik Barnabás. He, however, is the first to be under suspicion when a trunk containing puppets goes missing. The children follow him but, when they catch up with him, they discover he hasn't got it. Pepík offers to help them in their search.

On an early Sunday evening, people of the small town are reading lottery results that are hung on a board. Young man Karel Antos is annoyed that his lottery-ticket missed the main prize, a car, by only one number. Karel is going to the pub to drink away his bad luck with his friend Jirka Broz. The old accountant auditor Zelinka drops a wallet. Karel picks it up and before he gives it back he notices the winning lottery-ticket in it. Both young men accompany the old drunk man. Karel steals the ticket and exchanges it with his own. Next day, Zelinka is found dead. Investigators, Captain Tuma and the Lieutenant Líbal, soon discover that this is a murder case covered up as an accident.