The film is a humorous exploration of married life, exaggerating the image of a "tired" sex life of a middle-aged couple. The search for the reasons behind his workaholic partner's lack of interest in marital sex leads him to believe that she is unsatisfied with sex with him for one reason only: he allegedly has a small penis. While comparing the size of his penis with his friend Boris, he is caught by his wife Vlaďka, who becomes convinced that her husband Leon is having an affair with his friend. At the same time, Leon envies the rich sex life of his neighbor Tomáš, who works as a television producer, filming journalistic reports on fraud and corruption, with Vlaďka as his assistant. Leon's brother-in-law Evžen is a member of a religious sect and tries to recruit Leon, but Leon resists. The story unfolds against a backdrop of misunderstandings arising from unclear information and constructions created by the individual characters...