Set in the era of Dutch colonialism, Landlord Kedawung is devastated by his first wife’s death. But apparently, her death is something that the second wife, Zubaedah, has been waiting for.
Wastrel New York millionaire Roland Van Dam travels to New Orleans during Mardi Gras, looking for adventure and romance. Because the costume he is wearing includes a red gardenia, he is mistaken for escaped prisoner Emile Le Duc by a woman (who turns out to be a long-lost cousin) who was to meet Le Duc, who was to be wearing a red gardenia. It turns out that Le Duc is the head of a vicious gang of counterfeiters, and Roland winds up getting in more adventures than he had hoped for.
A captain saves a kidnapped magnate from a nursing home run by foreign agents.
A gentleman trades place with a notorious gangster who's his dead ringer to prevent an evil baron to marry his fiancée.
When a banker is threatened by extortionists, and his son is kidnapped, woman detective miss Clever goes undercover.
General Gutierrez, the evil governor of Mexico, terrorizes the people and demands high taxes. The young Ramon Martiney, after discovering that his father was murdered by Gutierrez, dons the mask of Zorro and starts fighting against the injustice.
American mining engineer Jim McClellan is in love with Dolores de Silva, daughter of the deposed president of a Latin American country. He becomes involved in the revolution....
Phyllis Fowler claims to be just a "simple little country girl" trying to get by in the wicked big-city, and she takes a big getting-by step when she pulls a scam that gains her a $17,000 diamond from an exclusive jewelry store. Soon, a private-detective, who has a dupe gem matching the stolen one, the police, and two gangster buddies of the jeweler are all racing each other to get the diamond back from Phyllis. The country-girl provides them all with a wild chase.
John Raglan is a seal hunter being hounded by hijackers, so he strands himself on an isolated island in the Bering Sea that is owned by a corporation. During a fierce sea-storm, Raglan rescues the passengers of a floundering ship, which includes the owner of the island, his daughter and her fiancée. The owner threatens to charge Ragland with poaching on private property, and then a gang of seal-skin thieves make an entrance.
George Fowler arrives at the Mias saloon, and the proprietor, "Blak Jack" Hovey, orders a saloon girl, known only as "The Flame," to fleece him, but he has no money...
The young inventors Dick and Jenny Brewster, build their own 'Hoverbug' and hope to win the race which has been organised for home-made Hovercraft, but their arch rivals, Charlie and Sydney, bend the rules by enlisting professional help and by employing devious means to sabotage the Hoverbug.
The plot revolves around a rivalry between sand-hog "Hard Rock" Harrigan (O'Brien) and his foreman Black Jack Riley. At the center of their conflict is their mutual affection for heroine "Andy" Anderson (Irene Hervey). But when the chips are down and Riley is trapped in a tunnel cave-in, it is Harrigan who comes to the rescue.
A man is framed for being a spy. After he is released, he sets out to find who the real spies are.
After a criminal gang kidnaps a scientist with valuable information about nuclear weapons, an undercover agent named Jorge Rubio tries to infiltrate this gang in order to deal with the situation. The gang, however, quickly unmasks Rubio and uses both brainwashing and torture techniques on him. They also create a clone of Rubio, thus setting up a show-down battle between the two look-alikes.
Shunned by his family, a male endangers his life after he finds hidden treasure belonging to 40 thieves.