Geiger (Peter Luo Peter Lorre) is a surgeon with excellent medical skills. He is madly in love with stage actor Yvonne (Francis Drake Frances Drake), but Yvonne is married to pianist Stephen (Colin Cliff Colin Clive). Although Yvonne has a famous flower, but Gagel did not give up his love for her, always trying to get close to her. In a big fire, Stephen's hands were badly hurt and he could no longer play the piano, which killed him. In desperation, Yvonne had to ask Gagel for help, because only he had the miraculous craftsmanship of a broken hand. Gagel attached a pair of murderer's hands to Stephen's wrist, and although he had them again, Stephen could no longer play. Finally, when Stephen learned the truth about the origin of his hands, he went crazy.