The heroes of the series "Soloveyka" are young lovers Katya and Vanya. They grew up in the same orphanage and always dreamed of being together. But fate had other plans: Vanya was adopted by the Bagrov family, and later decided to marry their daughter. Meanwhile, Katya became pregnant by businessman Golubev, who abandoned her with their child. Now Katya's daughter is growing up to be a talented singer, but her education requires money. So, Katya decides to become a surrogate mother for a wealthy couple... only to discover that the couple is none other than Vanya and his wife.