Sasha, a 17-year-old Muscovite, finds out that her mother is going to remarry, and she will have a stepbrother Mamazhan. Peaceful coexistence is quickly under threat: Sasha is biased against the Genre and prevents him from making music, and Jean considers Sasha an arrogant kid and hinders her sports career in every possible way. Wanting to get rid of each other, teenagers enter into a confrontation that leads to unexpected consequences for both.