The adopted daughter of Dr. Skvortsov, Tanya, having learned that her mother Natalya Avdeyevna is alive, who was considered dead during the bombing of World War II, decides to go to her in a distant village on vacation. She recognizes the woman who gave her life and lost her husband and sons due to the war, but cannot call her mother. Meetings on the collective farm with interesting people make Tanya think a lot and experience a lot. She discovers for herself a completely new, largely alien world to her. It does not immediately penetrate the sense of inner kinship with this world, its people, so unusual for her.

Twelve graduates of the tenth "A" arrive to the virgin lands. Freed from childhood illusions, yesterday's schoolchildren get used to the unsettled life, to hard work on combines, tractors, on the threshing floor. Soon other difficulties are discovered.