One day, at a train station, the suitcase of little Irina's wealthy family was stolen. The thieves were helped by Lyubka, a seven-year-old girl who lived on the street. Many years later, Irina, who has become a doctor, is doing an internship in a distant city in the Urals with her mother and daughter. The mother dies and Irina has no one left to look after her daughter, while she works at the hospital. She hires Lyubka, who has just been released from prison...