16-year-old Maria is forced into Serra D'Aires convent, secretly run by Satanists.

The plot has pretty, middle-class Caucasian girls (college students, runaways etc.) being kidnapped right of the streets of Zurich and Montreal(!), and after being beaten, raped, and hooked on heroin, they are sent to Amsterdam to work as zombified strippers and prostitutes in a nightclub called the Moulin Rouge. A female reporter is investigating the disappearance of one girl and ends up on the trail of the slavers.

Nightclub owner and erotic dancer Rita Blue uses her place as a front for working undercover as a spy. Motivated by her vehement hatred of men that stems from having been sexually abused as a child, Rita and her seductive female cohorts not only gleefully torture guys as a means to obtain vital information, but also manhandle wealthy men in order to make them hand over their fortunes to them.

Margarita is found, naked and bloody in a luxurious house and is promptly taken to a mental institute. The doctors and nurses meant to take care of her aren't exactly who they seem and a mysterious figure, clad in black, circles the premise at night, offing nubile young women.

A young woman feigns illness in order to infiltrate a mental hospital, where she investigates the disappearance of her sister, a former patient. Meanwhile, the hospital warden and her attendants abuse and torture their charges, forcing them to star in cheap skinflicks.