Based on the novel of the same name by Leonid Leonov. Young Polya comes to Moscow: she wants to find her father, Professor Vikhrov, and try to understand why her mother broke up with him. Vikhrov is a prominent scientist who has defended the forest from barbaric destruction all his life. The war begins. Professor Vikhrov continues to lecture, proving to students the need to protect the forest. Polya is trying to find out the reasons for the long-standing feud between her father and academician Gratsianskiy. Now, when Vikhrov is already not young and lonely, the professor mentally returns to the past...

A TV film about how the hard days of the siege of Leningrad united the residents of a communal apartment. 1941. Teenager Petya is taken in by a neighboring family after the death of his mother. The boy goes to work at the factory, and when his younger brother Vovka is found, Petya strives to replace his father.

A three stories all related to children and sea travels.