The film is a metaphor for the Cold War. It depicts two neighbouring nations: peace loving Fortuna and the not so peaceful land of the Steel City.

The director of films for kids called Bonzurka together with her loyal assistants Drahuska and Honza are looking for the actors for a new movie "The Knee". Children for this movie should not be afraid and shy and they must have talent for acting. Thus the scouting is quite difficult. The most difficult is to find an actress for a main character who lost her hair after a serious illness and now has to spent the whole holiday in the countryside with a bald head resembling a knee. Although the makeup artist does his best an artificial baldness does not solve anything. From the selected little girls only the self-assertive Rosemary has the guts to let her long hair to be cut and shave off her head.

The sore and tender hearts of a young couple with a toddler are explored in this drama. The little girl, four years old, is not aware that she is doing anything distressing while she ambles about the house on the day after a post-examination celebration by her father, a university student. Even though hung over, he tries hard to be patient with her. The beginning of the story follows her on her little adventures. The girl comes down with a fever, which kills her before anything can be done, and the student and his photographer wife mourn and comfort one another. Little encounters with children cause the mother pain she is seldom free of, until she gives birth to their next child, a son.