Katya Sablina is at the peak of her sporting career. She is a biathlon star and the pride of the country. After another bright victory Katya decides to leave the sport to devote herself to her family - her husband Mikhail and son Danka. But one fateful evening criminals break into the house of Sablina, and Katya's husband is killed. All the evidence points to her. Under the pressure of circumstances and in the hope of returning to her son sooner, Katya pleads guilty... Danka is sent to his aunt. A year later she learns that her seven-year-old son has run away, and the police cannot find him. Katya decides to escape and goes to look for him, where she is unexpectedly helped by the district officer Ugryumov - a former St. Petersburg operative with a difficult fate. Together they go in search of the boy. In three days they will have not only to return the child, but also to understand the intricate crime that has turned Katya's life upside down.