While investigating the deaths of several people - all signs of victims of wild animals - Holmes and Watson learn about the activities of Dr. Moreau. This cruel geneticist and vivisector decided to confirm Darwin's theory of natural selection by creating new animal hybrids. And although the British government secretly sponsors these experiments for military purposes, he is furious that the scientific community ignores his discoveries, if not disgustedly rejects them. In his laboratory, hidden among the gangster dens and opium dens of London's Rotherhithe, Moreau gathers an army of half-humans, half-beasts. The time will come when these creatures will help a brilliant madman capture the attention of the whole world...