The harsh but fair mathematician Maria Pavlovna Trifonova finds out that for the sake of her health she urgently needs to slow down — she even has to drink antidepressants. The doctor also advises to establish communication with her granddaughter Nastya, whom Trifonova hardly sees. This is how an old-school teacher gets into a prestigious school of the future... and realizes that there is no peace here. After all, exact sciences require discipline and attention, and the age of technology has given children problems with both.

Natalia seems to have lost the habit of working at school. Or the newly minted head teacher simply wasn't prepared for the fact that an ordinary remark to a student could end with a juicy spit in her face. The principal begs him not to say anything to Misha's high-ranking parents, so as not to spoil their relationship with the school. It requires many years of experience in dealing with arrogant boys who were poorly educated at home. And Maria Pavlovna has one.