A story about a launch of one of the first "Vostok" space ships in 1960.

The film tells about the childhood and youth of the wife, friend and military ally of the founder of the country of the Soviets Nadezhda Konstantinovna Krupskaya. The main attention in the film is paid to the participation of a young revolutionary in the organization of the struggle of the workers of St. Petersburg for their rights, against the autocracy.

In the first days of the Second World War, a young woman with three children is evacuated from the front-line zone to the Urals. After some time, she receives a funeral for her husband. But she has her little sons with her. The eldest son Kolya becomes a reliable assistant to his mother.

A young boy from Prague is trying to find a Soviet soldier from the old 1945 picture.