This is one of the stranger adaptations of Robert Louis Stevenson's off filmed story. It begins in San Francisco, 1959, where Jekyll, the great grandson of the original, works ceaselessly in his grim basement with his new mind-control serum, one that is based on his grandfather's original formula. To test it, he uses male and female kung fu fighters. After injecting them, he gets them to fight each other. Unfortunately, by the story's end, they get bloody revenge upon him.