Wealthy playboy and snake collector Judas (Jack Palance) falls for sexy snake dancer Eva (Laura Gemser) and hires her to care for his pets. After her lover is killed by a snake, Eva sets out to find the person responsible for unleashing the creature and exact her revenge. On her native island, Eva uses a bizarre ritual involving a venomous black cobra to trap and punish the perpetrator. Joe D'Amato directs this lurid exploitation flick.