A Czech agricultural student, Šimon Plánička, arrives at the small South Bohemian town of Hoštice, and joins the local JZD (agricultural co-op) with the intention of trying out his experiment regarding the "Milk yield of cows in regards to a cultured environment". He runs into difficulty with the directorship of the JZD, but he finds them eager to help once they hear he's the son of the local agricultural commissioner, as his last name is also Plánička. Blažena Škopková is given the task of finding out how things are looking. However everything is complicated by the jealousy of Blažena's boyfriend Venca.
The plot begins in the Soviet Union showing first efforts to establish the Czechoslovak legion in 1942. The film also shows the assassination of Heydrich and the subsequent annihilation of Lidice. The main topis of the film is battles with German troops for Sokolovo.
In a suburban villa, a woman of means is murdered. Police Superintendent Zdychynec from the Prague Liben neighborhood reports the case to Police Councilman Vacátko, upon whose order an investigation is launched immediately. Zdychynec begins to suspect the wooer of his own daughter, a handsome dragoon named Rudi, of the crime. In Rudi's absence, Zdychynec searches his rented room in the apartment of the elegant Mrs Dragicová. All his findings - among others, sand left on Rudi's jackboots and a decent amount of money in his bedside table - convince the superintendent that he is following the right lead, especially when Rudi refuses to say where he was at the time of the murder.
In the morning twilight of Prague, the dead body of the safe-breaker Toufar is found floating on the river Vltava with a knife in his back. Police inspectors visit Toufar's lover, the prostitute Anna Kulatá (Jirina Bohdalová), nicknamed Umbrella, and it is apparent that the moment before she opened the door of her flat, someone fled through the window. Umbrella is summoned for examination to the head of the criminal police - Police Councilman Vacátko Jaroslav Marvan, but although shocked by the photograph of the dead man, she does not confess to anything. Before Toufar, Umbrella lived with the safe-breaker Penicka (Radoslav Brzobohatý), who loved her very much and made her quit her street trade. But when he was sentenced to three years' imprisonment, Umbrella began to live with the brute Toufar, who chased her to street again. In the case of the murder, Penicka is therefore the prime suspect.
This futuristic science fiction comedy features an atomic bomb blast that causes women to grow beards and lose the ability to have children. A summit meeting is held at the United Nations, with the proposed solution of building a time machine. The decision is made to travel back in time and murder Einstein, with the hopeful result being that without the noted mathematician's research there will be no atomic bombs.
A car deliberately runs down a young man on a road by a small border town. The locals recognize the dead man as one of the students who were there on volunteer work some time before. The police detectives, Major Kalas (Rudolf Hrusínský) and Lieutenant Varga (Radoslav Brzobohatý) can then get on the trail of the people with whom the victim was involved, especially at the photographic studio headed by Bohuslav Pacer (Bohus Záhorský).
Film shows the struggle of the Czechoslovak armed forces against groups of Ukrainian Insurgent Army (UPA) under command Burlak, who tried to pass through the territory of Slovakia.