What Have You Done to Solange?

What Have You Done to Solange? is a 1972 giallo film directed by Massimo Dallamano and starring Fabio Testi, Karin Baal, Joachim Fuchsberger, Cristina Galbó, and Camille Keaton. The plot follows a series of violent murders occurring at a Catholic girls' school in London, where a young student has gone missing.