Olga Lukyanenko

For five years, Irina patiently waited for her beloved Kostya to divorce his wife and propose to her. Finally, the long-awaited day arrived: Konstantin invited Irina to a restaurant and solemnly announced that he had bought engagement rings. However, the second ring was not for her, but for his boss's daughter. Irina was devastated. Unable to accept her beloved's betrayal, she decided to take her own life. At the entrance to the pharmacy, where the poor woman had gone to buy a lethal dose of sleeping pills, she encountered an abandoned dog. Upon learning that the poor animal was being taken to the slaughterhouse, Irina was overcome with compassion and decided to take it in.

The unusual adventure of two sisters – 26-year-old Margo and 38-year-old Katerina. They have never been close since childhood. As adults, they hardly communicate and know little about each other's lives. However, unexpected difficulties in Kateryna's life, which effectively knock her off her feet, and Margo's uncontrollable desire to win the heart of her beloved man bring the two sisters together. To carry out their plans, the sisters decide to switch places—Margo will pretend to be 38, and Katerina will become 26. The two women, who are complete opposites, must radically change their lifestyles, appearances, and habits, all for the sake of becoming happy and achieving their desired goals.