The film is set in Moscow, 1986; it opens with the Miroshnikovs' divorce. Their son, Ivan, а 17-year-old high school graduate, stays with his mother. Having failed the entry exam for university, his mother finds him a job as a courier for the magazine
Questions of Knowledge. On his first day at work, Ivan is sent to deliver a manuscript to Professor Kuznetsov, but instead goes skateboarding with his friend Bazin and ends up being very late in delivering the manuscript. At the professor’s home, Ivan meets his daughter Katya, and they quickly find a common language. During his next visit to pick up the manuscript, Ivan is invited to have lunch with the Kuznetsov family. Ivan’s direct and peculiar statements infuriate the professor, who yells at Ivan and kicks him out. As they say goodbye, Katya tells Ivan that she will call him later. Ivan and Katya start dating. They meet each other's friends, but neither of them manages to fit into the other's group. Ivan and his family are not rich and spend their time on "budget" entertainment, while Katya is a representative of the "" with corresponding interests and values. One day when Ivan is visiting Katya, they are playing with the piano and are caught by the professor. He pulls Ivan aside and insists he end all relations with his daughter, saying that Ivan is a bad influence on her, to which Ivan responds by lying that Katya is pregnant by him and asks the professor for her hand in marriage; the professor believes him. The next day, Ivan finds Katya near
Moscow State University and tries to apologize for his behavior, but it turns out that Katya also told her parents that she is pregnant. The young people then hide in a nearby basement to conceive the child, but they are ultimately interrupted by a passerby. In the evening, Ivan comes to Katya's birthday party with flowers to apologize to her family. He unexpectedly joins the guests and the Kuznetsovs' inner circle. The guests' conversation guests turns to modern times and youth, then turns into a confrontation and Katya's awkward confession that her dreams are far from her parents' lofty aspirations. Breaking down, she rushes out into the street, away from the guests. Ivan runs out after her and finds her not far from home. Katya asks Ivan not to come to her or call her anymore. On the way home, Ivan meets Bazin and asks what he dreams about. Bazin reports that he dreams of buying a coat, because winter is coming soon and he only has a jacket which is too light. After thinking a little, Ivan gives Bazin his coat and advises him to dream about something greater. Ivan walks through the yard, stops, and sees a soldier with a burned face and military awards - a reminder that military service awaits Ivan himself. ==Cast==