A telephone conversation between the daughter-in-law and her mother-in-law turned the life of a simple engineer from Ivanov upside down. After the beloved husband and loving son found out that he was an adopted child, the man set out to find a biological family. The foster mother did not object and told him when and where he was adopted. So where is the engineer's blood family from Ivanov now?

A few days after giving birth to the 13th child, the mother of many children fell ill. She went to the hospital with her newborn son. The woman died, and the father of 13 children returned home without the boy. Will separated siblings embrace each other 42 years later?