AllMovie

Warm and gracious, the young woman in this film is much disliked by the more rigid, ideologically oriented teachers at the school she works in. The key referred to in the title -- which she holds -- is the way into the hearts and minds of young people. When a tape made at a party her students attend reveals that their thought-processes are not firmly tied to the dominant dogmas of the Soviet system, she is called to account for their behavior by worried parents and teachers.