en Cuevana 3. At the end of the seventies, 29-year-old Petra Grust starts her job as a biology teacher at the famous Odenwaldschule. But soon Petra is confronted with the disconcerting reality. Teachers and teachers of the two sexes crawl together in the shower, young pupils drink alcohol and smoke, and a colleague even has a relationship with a minor pupil. Then Petra does a really terrible conclusion.