Traitress (1977)

Maria Alexandrovna, a teacher in a boarding school, is already under forty, and now she finally gets the opportunity to arrange her personal life. But the person with whom she wants to connect her life lives far away, and she will have to part with her sixth grade - the children with whom she replaced her parents. Children behave differently in this difficult situation - from altruism to inner protest and even risking their lives in order to keep their beloved teacher ...