Taxi driver Koukal (Miroslav Machácek) is stopped by the police for a routine traffic check. In the boot of his car the police find the body of a naked man. Koukal is arrested even though he claims he knows nothing about it. The case is assigned to Major Mlynár (Milan Sandhaus). The police identify the corpse as that of an Austrian citizen called Mitrik. Koukal has been regularly driving people interested in gambling to a secret gaming den. The police are put onto the gambling den by another taxi driver, who admits that he drove Mitrik there. Mlynár and officer cadet Pecka (Ivan Vyskocil) feign interest in gambling and visit the gaming den incognito.

At least the second victim of a sexual deviant has been discovered in the game reserve of the Hvězda summer palace. The heroine of our story, Olina, a classmate of the murdered 13-year-old girl, has a secret: an unknown man calls her and discusses her adolescent problems with her in a hushed voice.

Artist Bedřich Mára (Bolek Polivka) is unable to find much secure work due to his public antagonism toward the ruling Communist Party. He has a wife and two children. Life begins to change when art historian Alois Fábera (Jiři Pecha) begins working on a piece about Bedřich, leading to a job offer from a Party official. Things are looking up, until the wrong people hear portions of the historian's writing.

A motley of vacationers on a bus headed for a week long vacation at a seaside resort. Among them: a single, moderately famous singer; a nerdy, onanistic man; a couple of old ladies reaching senility; a couple of young gals looking for an amorous adventure; a family with a boy unsure about where he fits sexually; a beautiful woman that, besides working as a trip guide, has pretensions of being a music composer; a couple of gay men; and another family where the parents are stuck in a sexual ice age while their twentyish daughter is looking to connect with a man.