在第二次世界大战开始前,纳粹党与日本黑龙会策划一起邪恶的阴谋,他们派遣一名著名的医生梅尔彻到日本执行秘密任务,将六个日本特务化妆成相同的六个美国精英人士,然后就将精英暗杀由他们的特务取而代之。 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.