The story..A maniac is on the loose brutally killing young women. First the victim is injected with a venom so they are paralyzed but conscious before being slowly killed. Meanwhile a detective is on the trail of the killer. This 1971 giallo really is of the highest quality and superior in all departments. The direction is ultra stylish and the build up to many of the deaths is outstanding filled with suspense and photographed superbly. It's not consistently high on gore but when it does come it's bloody and quite nasty and there's a decent score by the master Ennio Morricone. The story is good and always interesting and the cast is also impressive with the likes of Giancarlo Giannini, Barbara Bouchet and Barbara Bach.