The Falcon gets involved with German fifth columnists when his brother is murdered. All is not what it seems, of course.
Fourth Falcon film is a bit of a let-down, with some notably weak performances amongst the various red herrings. Barclay and Clark do a good job taking over from James Gleason and Allen Jenkins in their roles, though. The film serves as a decent introduction to the new Falcon, Tom Conway, who slips effortlessly into a role which suited him better than brother Sanders. Still, one would expect better when the screenplay was written by two masters of comedic crime, Stuart Palmer and Craig Rice.