Eleven-year-old twins Kostya and Nadya look alike like two peas in a pod. Who could have imagined that they would also have to change places? When Kostya left home to meet his girlfriend, Nadya decided to cover for him and told her dad on the phone that he was at home. And dad said that now his uncle would come for Kostya to take him to the village. To help her brother out, Nadya changed clothes and left with her uncle, who did not notice the trick. Kostya had to go to other relatives under the guise of a sister.