A fifteen years old Jana escapes summer camp wearing nothing but bikini...

At the center of the crime story is the very large Kremp family, living in the family villa with other relatives and a subtenant. The parents had four adult children, two sons and two daughters, one of whom recently died. The investigation focuses on the recent death of their son Jan. The young man was considered the family "fool", whom no one except his mother liked, because he played various mischievous tricks on everyone. However, his death, as Captain Exner investigates, was not an unfortunate accident, but a murder. Who could have been interested in his death? Was the murderer someone from the immediate family? Captain Exner is looking for a motive...

Radek Simek, the driver of a postal car, is shot dead on his regular route. The Investigators give up initial suspicions of robbery, because he carried no greater amount of money. Even questioning Honza Marek, another mail car driver, brings no result. When the circumstances are becoming more and more suspicious. Marek decides to track down the killer on his own.

Maryša, a peasant daughter, is forced by her greedy parents to marry a rich miller, a widower with three children. But she loves the village scoundrel Franck, who has no hope against Vávra. Francek goes to the army and Maryša and Vávra go to catechism with the priest. Maryša and Vávra's marriage is unhappy. The parents also realize their mistake, especially Lízal, who offers his daughter to return home. Maryša refuses and also rejects the proposal of Franck, who has returned from the army and asks her to run away to Brno with him. She chooses a tragic solution...

Civil engineer Luděk Turna accepts an attractive offer from a Prague design office. He tries to get ahead even at the cost of deception, but he recovers in time and voluntarily leaves to build a motorway...