The best Fabio Testi’s mystery movies

After several coeds are murdered at a college, a professor who is who is having an affair with one of his students becomes a suspect. When other gruesome murders start occurring shortly thereafter, the teacher suspects that he may be the cause of them.

Angelo Russo, a sixteen year-old girl, is found dead in a river, having been fatally violated with a large blunt instrument. Inspector Di Salvo is assigned to the case and focuses his investigations on St. Theresa's, the exclusive school where Angelo boarded. Three of the murdered girl's classmates, Franca, Paola and Virgina (who call themselves "The Inseparables"), receive threatening poems from an individual using the name "Nemesis". Bizarre "accidents" start to befall the girls: Franca is injured when someone causes her horse to bolt and Virgina nearly breaks her neck on marbles left at the top of a staircase. But Di Salvo is determined to find the killer, even if it means using unorthodox methods. He is aided by Angelo Russo's little sister Emily, whose helpful clues lead to a boutique owned by a dubious character and a vice ring where "rich influential men pay well for teenage favours" ...

Twin sisters trade places with unexpected results.

A passionate filmmaker creating a film based upon a true crime casts an unknown mysterious young woman bearing a disturbing resemblance to the femme fatale in the story. Unsuspectingly, he finds himself drawn into a complex web of haunting intrigue: he becomes obsessed with the woman, the crime, her possibly notorious past, and the disturbing complexity between art and truth. From the Smoky Mountains of North Carolina to Verona, Rome, and London, new truths are revealed and clues to other crimes and passions, darker and even more complex, are uncovered.