When the mother and father of ten-year-old Lena and Sonya decide to get married, these two completely alien girls are forced to become sisters.

When the mother and father of ten-year-old Lena and Sonya decide to get married, these two completely alien girls are forced to become sisters. Now they share one room, one class, friends, and most importantly, they are fighting for the attention of their parents. Each of them dreams of returning to their former life, and for this it is necessary to embroil adults.