Slip and Sach are working for a local newspaper as a reporter and photographer, respectively. Slip wants to get the goods on a local gambling ring that is fixing sporting events, so he and Sach go undercover to expose the ring.
A beautician and her crooked boyfriend attempt to rob the bookie operation located in the back room, but when the plan goes wrong, they frame an innocent man.
The millionairess aunt of Errol's previously married wife is coming to visit, and since the aunt is dead set against divorce, the wife prevails upon Errol to pose as the butler, and brings back her inebriated first husband to pose as her current mate.
The third of the Monogram series based on Ham Fisher's "Joe Palooka" comic strip, opens with Knobby Walsh, the manager of Joe Palooka trying to talk his way out of a traffic citation, and the story leading to that point is told in flashback as narrated by Walsh.
After the discovery of two murders, Commissioner Chabrier, of the French secret services, is investigating the disappearance of plans affecting the national defense of the country robbed by a gang of international spies.