This joint Italian, French, and Monegasque production follows the murders of the models at an Italian fashion house. It's bright, colorful, & utterly ridiculous. It's very much like a more violent & deadly extended episode of Batman, except Batman & Robin never show up. There's even a wall hidden in a bookcase & a red telephone. The make-up (think blood, burns, and bruises) looks like make-up.
Cinematographer Ubaldo Terzano and composer Carlo Rustichelli make for a formidable pairing here. The sleazy jazz score is marvelous and compliments Terzano's frames of primary hues perfectly to help create an atmosphere and mood unequaled in the Giallo sub-genre. To criticise the script and the cast would almost seem cynical in this case such is the sensory delights of Mario Bava's dreamy masterpiece.
Full disclosure: I was very drunk when I watched this and when the killer was revealed I didn't know who they were in the context of the film. So I really have nothing to contribute, other than I was bored by the plot which was really there to service the deaths anyway.
Great original title - six women dying, so I was counting them throughout the film and that's why some of the twists were not so twisty after all. No matter what, the film is so amazingly lit, that I could have been watching anything in such light combinations. A true eye pleaser.