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.