At high school, some pupils decide to play a 'practical joke' on their teacher. On the day of midterm exam all of them say they she had told them the wrong date for the exam. She almost believed them, but then asked a girl known for her honesty and the girl could not lie. As a result everyone in the class gets an F for that midterm. That's a real problem for some of them - with an F they cannot have perfect GPA and will not enter prestige Universities. They want revenge...
For the first time, Natasha saw Elektron Yevdokimov at the Polytechnic Museum, where she came with Feliks. Then she really liked the confident speaker. Relations with Feliks didn't work out, and Natasha, leaving home, became a flight attendant — that is what she called her new profession. Once in a cafe, before the next flight, Natasha saw Yevdokimov. They met and began to meet. They experience their feelings for each other in different ways. By the power of her love, Natasha makes Yevdokimov understand what love is.
Anatoli Kuzmich retired and received a separate apartment in a new house. He and his wife are happy and make bright plans for the future: how they will go to theaters, museums, read their favorite books. But their daughter Lyusya suddenly gets married. Not wanting to part with her, Korolyovs persuade the young spouses to live with them in a new apartment. Soon a child is born, and gradually life together becomes unbearable...
