Dr. Nicola invited Douglas Ingleby to help him in a mysterious experiment. Unemployed and undoubtedly curious, Ingleby agrees to follow Nikola to a remote castle to help him take care of the old man on the verge of death, Nicola is trying to perform a miracle. But will Inglebys loyalty to Nicolau withstand the contrary to the requests of the old mans great granddaughter, will the experiment give the desired result, and what is he going to do with the sinister Chinese who preys on him?