Jekyll is a rich young man, fond of the study of occult science. In the course of his studies in his laboratory, he discovers a medicine that has the power of completely changing both the mental, moral and physical makeup of a man. He experiments with this medicine and discovers that he at once becomes another personality, Hyde. In his new form he is hideous physically and debased morally. He also discovers an antidote to the medicine that brings about these changes. While in the Hyde form he commits all manner of horrible outrages so that the whole city of London rings with the news thereof. Dr. Jekyll, while in his natural form, that of a cultured, charming young man, is horror-stricken by the brutalities which he commits in the other form. Ere long the medicine at last begins to have an extraordinary effect, the changes taking place without the volition of Jekyll. In order to protect himself from being seen by any one in his beastly form, he locks himself in his room, when he feels...
Moving Picture World synopsis