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.

The adopted daughter of Dr. Skvortsov, Tanya, having learned that her mother is alive, who was considered dead during the bombing of World War II, decides to go to her in a distant village on vacation.