Anton was a successful musician, but after an accident in which his girlfriend Liza died and a year in a drug treatment clinic, he lost everything. Now he returns to his hometown, where he has only his older brother Konstantin, who has always been his complete opposite. Konstantin offers his brother help, but with one condition. So Anton becomes a teacher at school and is forced to delve into the problems of teenagers. What lesson can be learned from communicating with a rebellious, freedom-loving teacher for whom everything in life is going wrong? Will such a teacher be able to properly influence teenagers and change their lives before his life is completely destroyed?