Susan arrives in Haiti to live with her husband Jack, who lives with a lesbian housekeeper and Olga, a nymphomaniac platinum blonde, introduced to her as Jack's sister. Susan begins to have nightmares about voodoo ceremonies and murder.

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.