What Have You Done to Solange?

Girls from a Catholic school in London are turning up murdered, and the one person who saw a killer is Enrico Rosseni (Fabio Testi), a teacher who was with a student he should not have been with. Massimo Dallamano keeps him on the wrong side of Inspector Barth (Joachim Fuchsberger), who starts to treat the affair as motive. Enrico can't tell the police or his wife Herta (Karin Baal) what he witnessed without admitting where he was.