Summer is coming in a small town on the Volga, and in the life of the self-confident and resourceful Sasha, it is a transitional time. At the age of 15, he is in a hurry to grow up, and growing up for him means earning and spending what he wants, sleeping with a girl from the next class and overcoming his enemy - a bully from the working outskirts.

As a result of mysterious circumstances, seventeen-year-old Olga from 2005 finds herself in 2024 in the body of herself, but already a thirty-six-year-old single mother. Having no experience of adult life, Olga behaves like a frivolous girl from the noughties, and dreams of returning to a carefree youth. But by the will of fate, she is forced to take responsibility for her high school son and play the role of a school principal, which she is completely unprepared for.

To earn money, nineteen-year-old Lyosha must lose a Zhiguli race to blogger Shkurny live. But even the younger brother does not know that according to the agreement in the finale, Lyosha must set fire to his grandfather's car. Having penetrated the vibrant world of drifters and learned the story of his grandfather-designer, Lyosha faces a choice whether to succumb to the blogger and destroy the car or defend the honor of his family.