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...
as Vikhrov
as Yelena Ivanovna
as Polya
as Gratsianskiy
as Taiska
as Natalya Sergeyevna
as Kittel
as Knyshev
as Kalina
as Titka
as Zolotukhin
as Krainov
as Semenikha
as Vanya Vikhrov
as Agafya
as Afanasy
as Sapegina
as Gratsianskiy's mother
as Osminov
as political commissar
as elder
as Grigoriy (uncredited)