Henry Jekyll, a London doctor, runs a free clinic for the poor and is constantly experiments in order to heal as many as he can. But his fiancè's father feels that Dr. Jekyll is too good to be true and insists that man is made up of both good and evil and that the only way to deal with the evil side is to yield to it rather than smother its impulses. Doctor Jekyll reflects on the words of his father-in-law-to-be and to prove or disprove the theory, develops a potion that brings forth the evil side of his character - a hideous deformed creature who he names Edward Hyde, a creature who lives by night, frequenting the opium dens, low bars and places of ill-repute. He also develops a potion to restore him to being the compassionate doctor - but as time goes on, the restorative potion is not as effective and 'Hyde' begins to emerge of his own accord...A horror classic and box-office success made in 1920.