A black-gloved psycho stalks the city's prostitutes, slashing the helpless women and then cutting various internal organs from his victims as keepsake souvenirs.

Scotland Yard zeroes in on the depressed husband (Naschy) of one of the hookers as the prime suspect in the case.

But could the killer really be someone much less obvious?

This rather routine Italian-Spanish giallo musters few surprises, but to its credit breezes along at a decent pace and has a handful of feisty call girl stabbings (including a sucker knife jab to the back, ouch).

The climax/revelation may prove predictable for some giallo fans, but the murderer's motivation is an intriguing twist.

With a jazzy score by Piero Piccioni.

Also known as Jack the Ripper of London.

Italian: 7 cadaveri per Scotland Yard.