XIX century. The village of Dymka in Bukovina. The wealthy peasant Ivonic and his wife Maria have two sons - Mykhailo and Sava. Mykhailo has fallen in love with Anna, and is afraid to confess to his parents because it is not known how they will react. Sava fell in love with Rahira, who has a bad reputation in the village. She incites Sava's hatred towards his older brother Mykhailo, because he should get a better land.

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...