Miracles for Sale (1939)

Mike Morgan creates the illusions that magicians use in their shows. While his business is Miracles for Sale, his hobby is exposing fake spiritualists. At the club, he is invited to attend the calling from the other world by Sabbatt, but Judy wants Mike to help her instead. Later that night, after spoiling an attempt on the life of Judy, and meeting Madame Rapport, Mike goes to Sabbatt's hotel only to find the doors chained from the inside and a strange voice speaking. Busting in, he finds Sabbatt strangled. While there seems to be no way for anyone from this world to commit the murder, it is only the first murder. Mike must find the how and why before Judy becomes the third and final victim.