Fifteen-year-old Jurek is to spend his holidays at home, in Silesia. After returning from school, he does not find her mother or her things. His father tells him a story about his mother's sudden departure to a sanatorium. The boy does not really believe it. The boy has a bad feeling about his mother. He wants to talk to his father, learn the reasons for his mother's decision, but his father gives him vague explanations. Jurek goes to Warsaw, to his mother's sister, and there he finds the bitter truth.