A teenage girl gave birth at the age of 15 and managed to name her son Seryozha when her mother, fearing shame for the family, stole the baby. Even before her mother's death, her daughter did not forgive her, because for 37 years she has been crying about a missing child. But exactly 37 years ago, on the other side of the city, a childless couple suddenly had a boy, Alyosha. Is the adopted Alyosha and the missing Seryozha really the same person?