The Two Faces of Dr. Jekyll
Dr. Henry Jekyll is experimenting with what he believes is the dual nature of all men: that there is in everyone both a good and an evil side of their personality that is in constant conflict. He's been publicly ridiculed for his theories but he presses on. His wife Kitty worries about him and tells him she very much dislikes his friend Paul Allen who she feels is taking advantage of him. That doesn't stop her from going out dancing with him however and soon falls in love with him. Alone in his lab, Jekyll injects himself with a solution he's developed - and a new personality emerges, that of Mr. Hyde. The use of the drug causes his entire metabolism to accelerate. He decides to exact his revenge on Allen and Kitty.