Looking for a field of study in Parapsychology, three students and their professor discover a castle in which they evoke the spirit of Marquis De Sade.

In São Paulo, Alberto is an insane and sadistic man that kills women, and lives with his mother that covers all his mess. When he kills his mother's employee Eliana, stabbing her in the bathtub, they bury her in the backyard of their house. Eliana's fiancé unsuccessfully seeks her out and when Alberto's mother advertises that she needs a driver, he applies for the job to sneak around the real estate trying to find Eliana.

Young women in the Amazon are kidnapped by a ring of devil-worshipers, who plan to sell them as sex slaves. Some of the women escape, but are pursued into the jungle by their captors. The women must band together to turn the tables on their kidnappers.