Based on novel of the same name by Mariya Khalfina. In Pavel Olevantsev’s family suddenly comes news that his daughter by another woman was orphaned. Pavel did not know about the existence of the girl, nor could his wife know about it... It is not easy to decide to take the child to his house. But it will be much more difficult to endear the girl to them, to return her the joy of childhood and the belief that she is not alone...

Colonel of the Ministry of Internal Affairs, Lukyanov, is going on vacation with his wife to a resort town, where his old friend, Major Alekseev, a local police officer, lives. When they meet, the old friends agree to catch up the next day, but Alekseev seems worried about something he needs to finish. That night, Alekseev goes on a mission alone, during which he is hit by a car. When Lukyanov hears about it, he offers his help to the local police as a private individual, feeling it is his duty to find out the circumstances of his friend's death. The colonel will have to determine whether it was a deliberate murder or an accident.

After the death of her husband, Tamara gave her daughter Olya to an orphanage and left for the North. There she creates a new family and, years later, calls the matured girl back. Not finding love in her mother's house, Olga left for a Siberian construction site with the plumber Roman. But the first difficulties frightened him, and he left her, never knowing that Olga was expecting a child.