After the death of her mother, a stranger appeared on the doorstep of her inconsolable daughter, who said that the deceased had left her in the maternity hospital 48 years ago. The stunned woman refuses to believe that her loving mother could have abandoned her daughter, besides, there is no similarity between them. What happened in the Volgograd maternity hospital almost half a century ago? And who will two unfamiliar women turn out to be to each other?