Captain Drummond is travelling to Switzerland to marry his girlfriend. However, when a cargo containing dangerous explosives goes missing from its place, Drummond is forced to delay his plans.
Mickey Lofton, young half-brother of famed war-aviator Jerry, fails in his attempt to enter the Canadian Air Corps, because of his fear of thunderstorms developed by an incident in his boyhood days. Jerry, now a Captain in the U.S. Department of Justice, is given an assignment to capture some border oil smugglers. Through his friendship with Raoul McGuire, one of the suspects, Jerry is accepted as a member of the gang. Mickey is in love with Raoul's sister, Molly. Gang leader Moran shoots and wounds Raoul, and is himself shot down by Jerry. Mickey flies Molly and her wounded brother to a hospital. Jerry takes off in another plane to guard Mickey's craft from a pursuing airplane, and crashes his plane into the gangster's plane but parachutes to safety.
The California-Yucatan Railroad, being built for the good of Mexico, is under siege by a gang of terrorists hoping to force its sale; no one can prove their connection to profiteer Marsden. Manuel Vega, aged co-owner, calls in the aid of his nephew James, great-grandson of the original Zorro. Alas, James seems more adept at golf than derring-do; but after he arrives, Zorro rides again! Can one black-clad man on horseback defeat a gang supplied with airplanes and machine guns?
When the miners of Roaring Camp become Godfathers to a motherless baby, they name the boy Luck and promise to set aside money for him from their diggings. But when they strike it rich the money is gambled away instead.
A Polynesian sailor is separated from his wife when he's unjustly imprisoned for defending himself against a colonial bully. Members of the community petition the governor for clemency but all pretense of law and order are soon shattered by an incoming tropical storm.
A kingdom's ascending heir, marked for assassination, switches identities with a lookalike, who takes his place at the coronation. When the real king is kidnapped, his followers try to find him, while the stand-in falls in love with the king's intended bride, the beautiful Princess Flavia.
The fourth and last of the George A. Hirliman-produced films starring George O'Brien (preceded by "Daniel Boone", "Park Avenue Logger" and "Hollywood Cowboy") that were distributed by RKO Radio. Hirliman sold O'Brien's contract to RKO, which then produced 18 series westerns starring O'Brien that ended when O'Brien went into the Navy at the outbreak of WW II. Long-time (past and future) O'Brien director David Howard served as Hirliman's Associate Producer on this film. "Windjammer" finds O'Brien as a subpoena server ordered to serve a subpoena on Brandon Evans (The Commondore) for a senate inquiry or lose his job. Posing as a playboy, he boards the Commodore's yacht during a yacht race, and the yacht is wrecked by a gun-running windjammer commanded by Captain Morgan (William Hall.) All hands are picked up by the windjammer, including the Commodore's daughter (played by Constance Worth) and put to work as galley slaves.
In 1897, little Priscilla Williams, along with her widowed mother, goes to live with her army colonel paternal grandfather on the British outpost he commands in northern India.
Colonel John Wister, on duty with the British army in the desert region of Dubik, returns to England on leave. There he falls in love with Julia Ashton, who cares deeply for him but believes herself incapable of love following the death of her fiancé; some time before. Wister convinces her that he loves her enough to live without her romantic love and that she should marry him. She does so and returns to Dubik with him. There she meets his adjutant, Captain Denny Roark. Roark is a dashing young man who reminds Julia thoroughly of her lost love. Soon she finds she is indeed capable of love, but it is Roark with whom she falls in love, not her husband. As warfare with the local tribes heats up and as Wister gains awareness of the unconsummated romance growing between his wife and best friend, tragedy lurks.
Harvey, the arrogant and spoiled son of an indulgent absentee-father, falls overboard from a transatlantic steamship and is rescued by a fishing vessel on the Grand Banks. Harvey fails to persuade them to take him ashore, nor convince the crew of his wealth. The captain offers him a low-paid job, until they return to port, as part of the crew that turns him into a mature, considerate young man.
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.
In 1620s France, dreaded swordsman Gil de Berault returns from carrying out a mission for Cardinal Richelieu, and finds the Cardinal worried about growing opposition from the Huguenots in the south. The Cardinal also warns de Berault that dueling has been outlawed, and will henceforth be punishable by death. Gil, however, promptly disobeys the law and is indeed sentenced to death. The Cardinal offers to cancel the sentence if de Berault is able to capture the duke who is organizing plans for an uprising. Gil travels to the duke's castle and is allowed to stay as a guest, but the duke's wife and sister immediately suspect that he is a spy. He and his servant still make good progress, until he falls in love with the duke's sister, which complicates everything.
Two boys – the prince Edward and the pauper Tom – are born on the same day. Years later, when young teenage Tom sneaks into the palace garden, he meets the prince. They change clothes with one another before the guards discover them and throw out the prince thinking he's the urchin. No one believes them when they try to tell the truth about which is which. Soon after, the old king dies and the prince will inherit the throne.
British diplomat Robert Conway and a small group of civilians crash land in the Himalayas, and are rescued by the people of the mysterious, Eden-like valley of Shangri-la. Protected by the mountains from the world outside, where the clouds of World War II are gathering, Shangri-la provides a seductive escape for the world-weary Conway.
Drummond manages to save a woman from jumping in front of his car but she runs away with his car. He traces her and she asks him to help her out of a dangerous situation.