Doctor Jekyll and Mister Hyde in a bad quarter of London : Lon Chaney plays a double role in the film and in the story, a robber (the Raven) and a man who carries about poor people (the Bishop). The way of acting is remarkable because it's a silent movie. The great thing is that the Bishop is half-paralyzed so Lon Chaney has to play the contorsionist when he moves from Raven into Bishop. The strange atmosphere is very well described with threatening faces and slumhouses.