A young prostitute is found brutally killed and is up to detective Germi (Claudio Cassinelli) the investigation of the case, as the search progress he uncovers a girls trafficking ring with connections to powerful people.
The script comes from Ernesto Gastaldi, possibly the most prolific writer in the Italian film industry. He wrote scripts for Bava, Fulci, Leone and more. If he has not written an autobiography, he really should... few scribes can claim to have put so many trashy masterpieces on the screen. Director Sergio Martino claims he added to the script and "changed it radically", though it is evident that the vast majority is Gastaldi's work.
Martino was responsible for possibly the best-named giallo film out here, "Your Vice Is a Locked Room and Only I Have the Key" (1972). This one is also usually called a giallo, though it may blur the line with a police procedural. Typically, a giallo protagonist is a common person, or at most a journalist, but rarely a police officer -- someone who should actually be involved in a mystery.
Sergio and his brother, producer Luciano Martino, were the grandsons of director Gennaro Righelli, who directed the first Italian sound film, "The Song of Love" (1930). While the Martino brothers worked heavily in cult and genre films, there is no denying they had a deep family history in cinema.
This may be Claudio Cassinelli's best-known film. He did go on to appear in "The Mountain of the Cannibal God" (1978) and "Hands of Steel" (1986), both directed by Martino. In fact, he tragically died in a helicopter crash while making the latter film, an event that Martino talks about in length on the Blu-ray.
The 2017 Arrow Blu-ray has a brand new 2K restoration of the film from the original camera negative, with the sound either mono Italian or English (your choice). We get a new audio commentary by Troy Howarth, author of "So Deadly, So Perverse: 50 Years of Italian Giallo Films". And, last but certainly not least, a new 42-minute interview with co-writer/director Sergio Martino. Oddly, Barbara Magnolfi was not interviewed, despite her being generally accessible.
