The year is 1962. Returning after an important mission, the polar aviation pilot Tagilov saves a young woman, Tatyana, who is stranded on a chipped ice floe. She is a doctor.

Bolshevik Foma Korshunov returns to his village. Soon his son, seven-year old Mishka gets a new nickname - "little communist". When bandits come to the village Mishka, knowing that the reds are close, saddles his horse and hurry to warn them about the danger.