¿Qué habéis hecho con Solange?

In London, the Italian gym teacher Enrico 'Henry' Rosseni (Fabio Testi) is having a love affair with his eighteen year-old student Elizabeth Seccles (Christine Galbo), who is the daughter of the owner of the Catholic School where he works and she studies. His estranged wife Herta Rosseni (Karin Baal) is the mathematics teacher in the same school. On Sunday afternoon, Rosseni and Elizabeth are in a boat in a grove and the girl glances at a knife and a man hunting down a woman. Rosseni believes she is giving a pretext to avoid him and does not pay attention to her. On the next morning, Rosseni learns that a teenager was murdered in the river bank in the grove and he drives to the location. Inspector Barth (Joachim Fuchsberger) goes to the school since the victim Hilda studied there and soon Rosseni becomes the prime suspect since he protects Elizabeth, who could give an alibi to him. When a second student is murdered, Elizabeth recalls that the killer where a black soutane worn by priests. While the police investigate the suspects, Elizabeth is killed and Rosseni decides also to investigate. He teams up with Herta and the find the name of the mysterious Solange Beauregard. They seek her out but what might have happened to Solange?

"Cosa avete fatto a Solange?", a;k;a "What Have They Done to Solange?" , is an intriguing giallo with a totally unpredictable story full of mystery and tension. The erotic plot is well-written with many twist and suspects. The conclusion surprises the viewer and it is worthwhile watching this film that is not dated. My vote is seven.

Title (Brazil): "O quê Vocês Fizeram com Solange?" ("What Have You Done to Solange?)

Note; On 10 Jun 2020 I saw this film again.