Roy Rogers, a Nevada State Ranger Captain in charge of the Rangers Reclamation Service, makes a trip to Las Vegas for the annual Heldorado Frontier Days Festival, as he wants to help his old friend Gabby Whittaker who originated the idea (at least, in this film).In Las Vegas, Roy meets heiress Carol Randall, who has been selected as the Queen of the Heldorado. Roy is informed that the F.B.I. wants an immediate investigation of the counterfeit thousand dollar bills that are being passed over the gambling tables at the casino.
A US Navy submarine, the USS Corsair, is operating in the North Atlantic, hunting German merchant raiders that are preying on Allied shipping. Its new executive officer, Lt. Ward Stewart, has been transferred back into submarines after commanding his own PT boat. At the submarine base in New London, Connecticut, he asks his new captain, Lt. Cmdr. Dewey Connors, for a weekend leave to settle his affairs before taking up his new assignment. On a train bound for Washington D.C., Stewart accidentally encounters New London school teacher Jean Hewlett and her students. Despite her initial resistance to his efforts, he charms her and they fall in love.
When police officer Moe Finkelstein and his colleague Officer Salomon are ordered to serve as bodyguards to German consul Karl Baumer by the mayor of New York City, Finkelstein turns in his badge, convinced he has to quit the service because the man is a Nazi.
Lucky Jordan is a gangster living in New York City and when he's drafted into the army, he tries to escape duty by using an old con woman named Annie to convince the draft board he's needed at home. When that fails, Jordan is sent to boot camp, but he doesn't stay there long. He takes a beautiful USO worker hostage and flees back to New York. There, he learns that a rival gangster is plotting against America.
Jim Gordon commands a unit of the famed Flying Tigers, the American Volunteer Group which fought the Japanese in China before America's entry into World War II. Gordon must send his outnumbered band of fighter pilots out against overwhelming odds while juggling the disparate personalities and problems of his fellow flyers.
In the second film of the series (and not a second part of anything), Gay Lawrence, aka The Falcon, is about to depart the city to marry his fiancée, Helen Reed, when a mystery girl, Rita Mara, asks for his aid in disposing of a secret formula for making synthetic diamonds. He deliberately allows himself to be kidnapped by the gang for which Rita works. His aide, "Goldy" Locke, trails the kidnappers and brings the police. But the head of the gang escapes, and the Falcon continues the pursuit.
Private detective 'Duke' Martindale and his wife, Phyllis, an attorney, are working together to clear a girl falsely convicted of murdering a judge. Two people who know the truth are killed and 'Duke' Is shot at. Despite some interference by Police-Sergeant Brent, and a dangerous automobile chase and 'Duke' and Phyllis finding themselves prisoners of the real murderers, the case is solved.
In his first starring Western for RKO, young Tim Holt must not only carry on his father's freight business but also hunt down his murderer. A certain Matt Gardner wants to corner the freight business to Pecos and persuades young Zack Sibley's wagon master to switch sides. Zack also earns the enmity of Gardner's son Coe, who takes umbrage to the youngster's flirtation with pretty Helen Lee. It all comes to a head during a food shortage in Pecos, a near-disaster that persuades the wagon master to switch sides once again. When the dust settles, Zack learns that old man Gardner is actually Carl Anderson, the man who murdered his father.
Brad Henderson arrives in Star City just in time to witness three men rob a bank of $30,000 and kill a teller. Charged for the crime and jailed, Brad realizes he must escape and track down the real killers since the only one who can prove his innocence is his friend, Sheriff Bill Gregory, who has been shot and will not soon regain consciousness. Chasing down the robbers one by one, he eventually discovers the identity of the gang's ringleader.
Detective Guy Johnson's client, Willie Heywood, is framed for murder. While Guy hides him so he can catch the real killer, both of them are nabbed by the police, tried, convicted and sentenced to jail: Guy for a year with Willie to be executed. On the way to jail, Guy comes across a clue and escapes from the police.