Humanitarian Roberta induces her father to hire former convict, Bill, as his gardener. When she leaves on vacation, Bill steals her jewelry and eventually sells a brooch to her boyfriend, Richard, who unknowingly gives it to her as a present.

A baronet's son marries a barmaid in order to qualify under the inheritance terms of a will.

Wanting to escape from the drab life of the country, Helen Wayne moves to the big city and becomes a secretary for the Calder family. Just before beginning her new job, however, Helen meets a man who promises to take the hungry girl to dinner. When she goes to the prearranged meeting place, she is arrested and her name is put on the police record. Some time later, Helen and young Rand Calder fall in love. As they are about to announce their engagement, Martin Ingleton, the man who earlier had caused Helen's arrest, attempts to ruin Rand's business ventures. When all of the principals go to court to fight the issue, Ingleton recognizes Helen and tries to label her a woman of unworthy character. Instead of causing Rand to admonish her, however, Ingleton instigates Helen to tell the judge her story and she is exonerated.

A tramp is hired to pose as a financier to obtain a Balkan radium concession.

Young thief “The Bat” to distract an old bookseller, while his partner, “The Fly,” robs the till, purchases a book at random. Later, after a chase and escape to the Devil's Roost, Old Meg's refuge for thieves, he takes the book from his pocket and is about to throw it aside when the title attracts him, "Electricity Made Simple." Intrigued, the volume opens a new life to him and in time enables him to rescue the bookseller’s daughter Bess when she falls into trouble.

During the illness of her father, Toni Carter, Milly takes his place as station agent. Both Dave Snowden, a freight engineer, and Bill Mailey love her. Bill, a land express courier, who distrusts and dislikes Dave sees that both the girl and her father favor his rival and decides to disgrace the station agent and his daughter.

Kid Kelly, a gangster in New York's Lower East Side, attempts to rob Goldberg's millinery store. When the police arrive, Flo Haines, who had come to the building to look at an apartment, hides. When the police find her, they charge her with the crime, but the Kid turns himself over to the law instead. After his release, he again meets Flo, who works in an artificial-flower factory by day and at Reverend Roberts' relief mission by night. The Kid soon falls in love with Flo, and his jealous sweetheart Mamie tricks her into coming to her apartment, where she drugs her and turns her over to Joe Carelli, the flower factory's lustful owner. The Kid saves Flo, but when Carelli is found murdered the next day, he is arrested for the crime. The confession of Annie, who had stabbed Carelli in a jealous rage, frees The Kid, who reforms himself and marries Flo.

A man breaks into a flat, startling the occupant. They argue about the new girlfriend of the 'burglar', who's come to get her stuff. Then a third man bursts out of the cupboard...

In Dijon, Inspector Hanaud investigates Betty Harlowe after her uncle, Boris Waberski, accuses her of poisoning her wealthy aunt for an inheritance. While an initial autopsy finds nothing, Hanaud discovers the use of Strophanthus Hispidus—a rare, undetectable poison applied via an antique arrow. Amidst a flurry of "poison pen" letters and deception, Hanaud proves the murder occurred despite the lack of conventional medical evidence.

A lady gambler shields her brother by claiming responsibility for a forgery he committed.

The secret formula for the world's most powerful explosive has been stolen from the U.S. government. William Brown, a clerk who aspires to be a detective, has just received his badge from some anonymous Midwestern agency, and manages to get himself embroiled in the intrigue.

A King’s Messenger has important documents stolen by a female spy. The plot follows the messenger’s uncle as he takes action to track down the culprit, retrieve the papers, and unmask the spy.