An underage teenager (Nastassja Kinski) is having a torrid affair with her handsome, but much older and married German/English teacher. A troubled male classmate spots them during one of their assignations in the woods. He sexually blackmails the the girl and he also tells a couple of his mischievous female classmates, who blackmail the teacher for passing grades. The man's wife, who is also a teacher at the same school, eventually finds out and is surprisingly understanding. But a murder also occurs and the police become involved. . .
This is one of a number of sexy European movies the then-teenage Nastassja Kinski was involved in in the late 70's before she became an international sex symbol. It is true that they would probably not let a girl this age be in movies like this today, definitely not in America anyway. But it's also pretty disingenuous to pretend Kinski wasn't already very attractive back then. She was actually about the average age of teen fashion model today, and if you've ever actually SEEN one of these innocuous European "nudie" movies, it's pretty hard to argue they are any less wholesome than the things that go on in the fashion industry today or the things teenage girls who are a scant two years older and "legal" routinely participate in in the modern American XXX porn industry. But even within Kinski's underage film oeuvre this is film not as questionable as "Wrong Turn", which she made when was barely pubescent, or "Stay As You Are", which is far more sexually graphic.
But if you can write off Kinski's brief topless scenes as a forgivable moral lapse (or a nice bonus feature), this is actually an entertaining thriller. It is somewhat reminiscent of the British films "Assault" and "Unman, Wittering, and Zigo" or the Italian schoolgirl-giallo "What Have You Done to Solange?", but it is not quite as much of an over-the-top murder mystery, and it actually works pretty well as a straight drama. Being a German movie, it's also (not surprisingly) quite similar to any number of the vignette stories in the then-popular "schulmadchen-report" films. But this movie is too well-acted and too well-made to be written off as pure exploitation like those films. It isn't a film for everybody obviously, but I would recommend it.