Married with two children, Krymov leads a calm middle-class life as a physicist and sometime science writer. His life is disrupted by the arrival of his alleged son Pavel - a veteran of the war in Chechnya who has lost an eye. Although Krymov denies paternity, he welcomes the young man and tries to arrange an operation for his eye. Colonel Timur corroborates Pavel's identity and portrays him as a hero. In response, the compassionate Krymov hesitates to move Pavel to a military hospital. Krymov's daughter Anya accepts the stranger at face value but his son Egor and his wife Rita have their doubts. These are confirmed at a family dinner when Pavel describes climactic scenes of battle in such a way that Dr. Edik, a family friend, warns Krymov: this young man is disturbed and he's a fascist. Despite Pavel's attachment to the family, Krymov decides he must react: he sends the intruder home. Pavel returns immediately, however, claiming that he must protect "his" family from the "enemy" that is hiding everywhere.
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