Angela 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 Angela boarded. Three of the murdered girl's classmates, Franca, Paola and Virginia (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 Virginia 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 Angela 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..."

What Have You Done to Solange?
1972
6.7/10

Deep Red
1975
7.7/10

Your Vice Is a Locked Room and Only I Have the Key
1972
6.5/10

Opera
1987
6.8/10

Seven Blood-Stained Orchids
1972
6.2/10

Like Minds
2006
6.4/10

Torso
1973
6.6/10

The Fifth Cord
1971
6.6/10

Crooked House
2017
6.4/10

Happy Birthday to Me
1981
6.0/10

Cult Killer
2024
6.4/10

Sleepless
2001
6.1/10

Striking Distance
1993
5.9/10

Mindcage
2022
5.9/10

What Have They Done to Your Daughters?
1974
7.1/10

I Know What You Did Last Summer
1997
6.0/10

Tightrope
1984
6.2/10

Into the Labyrinth
2019
6.3/10

Cleaner
2007
6.1/10

Lady in White
1988
6.1/10
The Tripper
2006
4.883/10