A cabal of American industrialists, all fifth-columnists intent on sabotaging the war effort, are methodically murdered by the malevolent Monsieur Colomb. It is only until detective Dick Martin is assigned to the case that everyone's true motives and identities are revealed.
Mystery writer Cornelia Van Gorder has rented a country house called "The Oaks", which not long ago had been the scene of some murders committed by a strange and violent criminal known as "The Bat". Meanwhile, the house's owner, bank president John Fleming, has recently embezzled one million dollars in securities, and has hidden the proceeds in the house, but he is killed before he can retrieve the money. Thus the lonely country house soon becomes the site of many mysterious and dangerous activities.
This chilling tale features Bela Lugosi as the dark Voodoo prince.
Insurance salesman Albert Tuttle arrives at the Cyrus J. Rutherford estate to sell the millionaire some life insurance. Rutherford is already dead and his heirs have gathered at the mansion to hear the reading of the will. Rutherford's will won't be read until he is properly entombed and the heirs are forced to stay on the premises or be denied their inheritance. Tuttle soon finds himself mixed up in shenanigans involving Rutherford's niece, secret passages, a missing body and murder.
