A classic whodunit giallo and one of the best in the genre, if not a top ten absolutely in the top 20 gialli.
The film takes place in a high-rise building where Jennifer (Edwige Fenech) and Marilyn (Paola Quattrini)
shares an apartment. It starts with a brutal scalpel killing in an elevator and followed later by a drowning
in a bathtub homage to Mario Bava's "Blood and Black Lace".
Jennifer's boyfriend is Andrea (George Hilton) who plays an architect that can't stand the sight of blood.

Who dun it ? Lots of red herrings. Could it be Jennifer's stalking sex cult leader ex-husband, the old lady,
the violin playing professor (George Rigaud), his lesbian daughter Sheila (Annabella Contrera), Andrea
or the black girl (Carla Brait) ?
The fine soundtrack by Bruno Nicolai.

Presented in widescreen 2.35:1 with italian or english audio 1.0 DTS-HD with english subtitles
Extras:
Audio commentary by Guido Henkel
Ernesto Gastaldi and Giuliano Carnimeo interview (29 minutes)
George Hilton interview (21 minutes, 2023)
Paola Quattrini interview (12 minutes, 2023)

Outtake reel, image gallery, Italian and English trailer

The Old US DVD edition pic above
With alternate murder scene, a trailer and a filmography of director Carnimeo
Earlier this film could only be found as extra DVD in the old Anchor Bay Box collection