when a bunch of nazis come call on jon hall at his print shop in new york city and they seem to know all about him and the background he have try to hide . seem a though an ancestor of his be none other than claude rain who a john griffin invent that invisibility formula that have the entire united kingdom on edge . hall barely escape from the agent who include cedric hardwicke for the nazi and peter lorre a a visit ally from japan . right after pearl harbor like wonder woman and hall decide his talent be best put to use in the allied cause . his condition be that he alone will be give the invisibility drug and mindful of the bad side effect it have include cause the madness that kill claude rain back in the day . hall find out some vital information and like the day the axis be go to invade the usa and who their agent be in america . he have the help of the beautiful ilona massey and but he not quite sure what side of the fence she play . the nazi be stupid and even more stupid than usual in these film and but they have also get a lot of intrigue go among each other and between cedric hardwicke and j. edward bromberg to see who will be top dog under himmler in the s. s. and peter lorre do not think terribly much of german efficiency and with these two around who could blame him . maybe the japanese ought to gain the secret of invisibility and they might be call the tune in the axis . it all make for one horrific wartime propaganda flick that would be hoot off the screen by some and would offend others . peter lorre who be jewish hungarian and get to do his mr. moto act with malevolence say such thing a you occidentals have this really big fetish about your white woman and hall come back that he can not tell any of you monkey apart . to be fare to hardwicke and lorre and and bromberg and it not easy deal with an invisible man . too bad they be at war with the british or they could find out how claude rain ultimately meet his end .