Cowboy Larry O'Day and his sidekick Lucky Smith happen upon a distraught Barbara Hartwell, who is about to be arrested for the murder of her uncle. With Barbara behind bars, Larry is determined to find the real killer and soon finds himself in the middle of a mystery involving crazed German entomologists and a smuggling ring bringing Chinese "picture girls" across the Mexican border for sale to wealthy Chinese bachelors.
Kindly soup kitchen operator and professor of criminology Karl Wagner uses his soup kitchen as a front for a criminal gang who commit a series of daring robberies and murders. When things get out of hand, Wagner kills his henchmen, who wind up as zombies in the cellar of the soup kitchen.
Joe is a reporter who is looking for his big break and he gets it when he takes over George Gorman's sports column. Marty is a hood who would fix any sporting event he could and Joe keeps the pressure of the paper on him. His wife Maxine, however, wants only the finer things in life and when Joe is on the road, she becomes Marty's Gal. That and the money that she owes Marty ends Joe's career as a New York Register columnist and starts his new career as a drunk. But Connie, who has had a crush on Joe for years, will try to make him the reporter he once was.
The second and final Grand National Pictures film to feature The Shadow, played again by Rod La Rocque. In this version, Lamont Cranston is an amateur detective and host of a radio show with his assistant Phoebe (not Margo) Lane. Cabbie Moe Shrevnitz and Commissioner Weston also appear.
Lamont Cranston assumes his secret identity as "The Shadow", to break up an attempted robbery at an attorney's office. When the police search the scene, Cranston must assume the identity of the attorney. Before he can leave, a phone call summons the attorney to the home of Delthern, a wealthy client, who wants a new will drawn up. As Cranston meets with him, Delthern is suddenly shot, and Cranston is quickly caught up in a new mystery.
The Phantom Robber gets a fortune in jewels and some valuable papers from a robbery on the crack train "The Midnight Limited" and Val Lennon and his pretty assistant, Joan Marshall, are on his trail. But the Phantom strikes three more times and adds murder to his list. Val decides to use himself as bait, although Chief Harrigan and Joan beg him not to risk his life. But Val, disguised as a wealthy Canadian, boards the train for a rendezvous with a killer.
In the middle of a pictorial lecture on his recent expedition to the Mongolian Desert, Dr. John Benton,the famous explorer, drinks from the water bottle on his lecture table, collapses and dies. His last words "Eternal Fire" are the only clue Chinese detective Jimmy Wong and Captain Street of the police department have to work on.