A 10-year-old boy unexpectedly comes to sports racer Maxim and declares that he is his son. The man knows that this cannot be - he does not know his mother. But the boy urgently needs his father and asks Maxim to help him. The hero learns that many years ago he became an anonymous donor for the mother of this boy. Maxim has a dilemma - whether he has the right to disturb the peace of a woman he does not know in order to become closer to the child, the biological father, who he is.