A New York radio personality travels to the small town of Fernville to oversee a contest to identify retired safecracker Jimmy Valentine, believed to be living there under an assumed name. The close-knit town of upstanding citizens is understandably upset by this venture, all the moreso when some of its citizens begin to be murdered. The radio personality and the local newspaper's young daughter collaborate on solving the murders while revealing Valentine, who has become one of the suspects.

Roy Rogers, Smiley Burnette and the Sons of the Pioneers go undercover to help Texas Governor Russell Hicks stop World War II Axis sympathizers from blowing up U.S. warehouses.

Bob Clemens is a cameraman for newsreels. Assigned to shoot the Swiss ice skater Karen Vadja, he arrives too late, so decides to film a woman skating on a different New York rink and pass her off as Karen. The scheme backfires when promoter Larry Herman takes a look at Bob's film and decides to make the skater a star. Unfortunately, it's actually amateur (and illegal immigrant) Marie Bergin in the newsreel footage, not the great figure skater from Switzerland. Chaos ensues as Bob tries to straighten everybody out.

Roy is a newspaper reporter. He goes to Cheyenne to cover the activities of supposed bad guy Arapahoe Brown. Roy, of course, discovers who the real bad guy is.

Bill Hickok, assisted by Calamity Jane, is after a foreign agent and his guerrilla band who are trying to take over some western territory just as the Civil War is coming to a close.

Best friends Kenneth Reynolds and Raymond Jordan are U.S. Navy officers, and Kenneth is engaged to Raymond's sister. But the eruption of the Civil War divides them, as Raymond stands by his native Virginia while Kenneth remains on duty as a Northern officer. Kenneth's uncle, John Ericsson, designs a new kind of ship, an ironclad he calls the Monitor. Eventually the war pits Kenneth, on board the Monitor, against his friend Raymond, serving aboard the South's own ironclad, the Merrimac (as it is called here). A naval battle ensues, one that will go down in history.

It's bad enough that Clarice Kendall Andrews, Paula's irresponsible sister, comes home from celebrating Mardi Gras and drunkenly mentions that she got married during the festivities. What's worse is the fact that Paula knows that Clarice is still married to an equally irresponsible gigolo. Paula learns that the man Clarice married, Stephen Cormack, is on his yacht and his lawyer, thinking that Paula is Clarice, offers the older woman $5000 to annul the marriage.