Slip gets fired from his job at a construction company for decking his boss. His sister, who got him a job at the company, is angry with him. Slip manages to get a job with the District Attorney serving warrants, as does Sach. Through his job, Slip finds out that all is not quite kosher at his old construction company, and that his sister may be in danger.
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 man wins $50,000 in a card game with gamblers, but is soon found dead and the money missing. Slip and Sach find the money near where the body was discovered, and soon find themselves the target of both the police and the gamblers.
Slip has entered the Boys' rattletrap car in a souped-up jalopy race, but has no chance of winning until Satch, with the aid of a scientist acquaintance, comes up with a chemical concoction that acts as a super-fuel; but a rival entrant in the race learns of this and tries to get the formula for himself.
After Slip is drafted into the Marines, the rest of the gang volunteers so they can be with him. Sach discovers that the colonel knew his father and he is promoted.
Sach is the exact double of a famous French scientist who has invented a powerful rocket fuel. Enemy agents, mistaking Sach for the scientist, attempt to kidnap him and get the formula for the fuel.
Slip and Sach take the rap for a robbery they did not commit in order to uncover the real robbers, whom they suspect are led by a convict who gives orders to his gang outside via a short-wave radio stashed somewhere in the prison.
Dr. Tom O'Hara takes over a public clinic in New York's desperately poor Bowery section. Boy gangleader Sock Dolan resents Tom's interference in moving Sock's kid brother to a hospital, because Sock blames hospitals for his mother's death.
Professor J. Waldo Purrington wants breakfast but has run out of food, he spots a fish truck outside but he has no money to pay for a fish so he decides to steal one, but he remembers his calendar quote "honesty is the best policy", so he can't bring himself to steal it, so he decides to try and make one fall out of the truck so he won't feel guilty.
A British wartime aviator who cheats death must argue for his life before a celestial court, hoping to prolong his fledgling romance with an American girl.
In the studio where the famous director Eric Von Berg reigns, Pierre Vanier, the male star of the film and the lover of Berg's muse, dies while rehearsing a scene.
A tale of an international counterfeiting-ring operating in Mexico starts with Patrick Nevil viewed as a suspicious character by newspaper woman Agnes Stuart, who is working on a story to expose racketeering night-club owner Doc Lilley.
All-American singing cowboy Jimmy Wakely went below the border in this musical Western from the assembly line at Monogram, performing such ditties as Adios Mariquita Linda, Rose of the Rancho, the inevitable La Cucaracha, and his own title tune.
