Literature teacher Fedorov has had a tough day: double lessons, meeting with his parents, scolding from the headmistress. To top it all off, as he is returning home, a girl follows him and won’t let go. She ends up snatching his schoolbag and running away. Fedorov tries to catch up with her and throws a piece of scrap metal at her. She stumbles, cries and complains about her difficult life. Then suddenly she starts accusing Fedorov of having driven her friend to suicide and threatens him with the arrival of her bandit fiancé. Judging this young girl to be crazy, Fedorov is about to move away without suspecting that this is only the beginning of a dangerous relationship.