Dr. Henry Jekyll has his own successful practice in London, England, adored and revered by the community. However, he has a dark secret: Edward Hyde. Because the medical board did not approve of his experiments, he made the irrational decision to experiment on himself. After the consumption of formula HJ7, his personality split. Good-natured, gentle, tactful, and kind Dr. Jekyll is sometimes taken over by his other persona: sadistic, crass, evil, and obsessive Mr. Hyde.