Terenty leaves the collective farm and goes to the city to study to become an agronomist. Marina works hard and looks forward to her husband's return. When her husband returns home, he reproaches his wife for being uneducated, asks for a divorce and leaves for the city. Left with her daughter, Marina devotes herself entirely to her studies and work.
A youth brigade at one of Kyiv's factories is competing for the title of Communist Labor Brigade. They are assisted by an old worker, Yakov Sereda. However, two people actively interfere with the Komsomol members: the rogue Yevgeny, who pretends to be a self-taught inventor, and the careerist engineer Kamensky...
Captain Ratanov is working on de-mining the port of Odessa after WWII.
