A 67-year-old resident of Rzhev intends to prove that her ex—husband has only one son - their common one. The new wife of the pensioner herself does not know who the father of the son to whom she was deprived of parental rights is. The man himself really wants to find out whether he has a half a million rubles alimony debt by the blood of the child. So who is the dad of 5-year-old Maxim, who lives with his brother under the guardianship of a non-native family?