The son, dying, bequeathed to his mother to take a DNA test with his only daughter. Grandmother does not recognize her granddaughter from birth, as she is sure that her son was infertile. But the girl's mother is convinced that she knows exactly who gave birth to her. Whose side will the truth be on?

The girl recognized her mother in the program "Beyond the Edge" and was horrified. She lived in a foster family for many years and did not see her relatives — her mother and older brother Seryozha, who by the age of 30, due to omissions in education, had not learned to read and write. But Seryozha was married, his daughter is growing up. Now his sister Sofia wants to know if she has a niece by blood.