When her father goes broke in the stock market, Jane Lee is forced to leave her prestigious boarding school. Glad-handing John Brock, an old friend of Jane's father, arranges for the girl to be hired as his stenographer. But Brock's lecherous ulterior motives become obvious when he locks Jane in the office and tries to rape her. When she manages to escape his advances, Brock vengefully frames the girl on a robbery charge.
Old Silas Blackburn, a wealthy recluse, lives alone with his butler and his ward Katherine. One night, Katherine discovers Silas murdered in the room where three generations of Blackburns have mysteriously died. Silas' grandson Robert, whom Katherine loves, comes to visit the next day, suffering from amnesia.
Orphan, Audrey Bedford takes the blame for her half- sister's gem theft and later exposes her employer as her crooked husband.
A blackmailed ex-thief is executed for a murder he didn't commit.
Brothers James and Allen Mornington are both addicted to cocaine and both believe that their addiction is caused by a hereditary failing. James rises to the position of judge, but when Allen is brought into his court on drug charges, James resigns. The two brothers, along with James's daughter, Hilda, then retire to the country to fight their desire for drugs.
A reporter and a detective team up to solve the murder of a nightclub singer who had been involved in a divorce scandal.
Wade Hildreth is sent to New York from London to receive a diamond necklace for Lady Gwendolyn from the jeweler Arabin. A gang of crooks led by Pete Fielding, known as "The Shadow," plans to keep Hildreth from going to Arabin's until they have robbed the store. Actress Morn Light, whom the Shadow loves, agrees to entice Hildreth to her apartment to be imprisoned. When she warns Hildreth because she wants to avenge her father's death, which was caused by the Shadow, the Shadow overhears and captures them both.
Bob Marston, a San Francisco socialite turned amateur detective is assigned to apprehend a gang of bootleggers.
Jim Crosby, the product of a broken home, becomes a gangster and goes to prison. Meanwhile, Ann Payton, an heiress, converts a saloon into a mission. She is engaged to her father's secretary, Temple Vaughn, a gambler. Jim is released from prison and seeks shelter at the mission. Temple becomes indebted to gambler Phil Johnson and is forced to arrange a crooked poker game involving some of his wealthy friends. Jim overhears the plot and, realizing that Temple is Ann's fiancé, robs the poker game and puts a check Temple forged into Temple's own pocket.
Following his mother's death, John Gregory becomes the "Eagle," a thief determined to get even with the mining company that stole his family's fortune. Breaking into the company’s head office he discovers that another robber has preceded him and killed the night guard. When he is falsely accused, Lucy the girl he loves, discovers a written confession from the real killer just before John is to be hanged and rides wildly to the jail to save his life.
Holmes and Watson match wits with an opera star intent on blackmailing a king.
When Mary and Fannie Graham, daughters of a good mother but a father with criminal instincts, are left motherless, Mary flees from her unhappy surroundings while Fannie, inheriting her father's disposition, remains and is raised as a thief.
At the death of Count de Beaulieu, his daughter Jeanne learns that her father had been the arch-criminal known as The Phantom. The only other person who knew her father's identity was his lieutenant, Franz Leroux, who now demands that Jeanne marry him in return for his silence.
From a Montana mining camp, a young man progresses to the society heights of New York, making his mark publicly as a dancer, but secretly as a gentleman burglar.
Priscilla Worth, an innocent country girl, goes to the city to visit her aunt, who has sent for her, thinking that her childlike simplicity will afford a welcome relief to Vincent Morgan, a wealthy bachelor and man-about-town. The plan works, but soon after Vincent and Priscilla's marriage, Vincent, besieged by his friends to return to his gay life and suspicious of his wife's relationship with Durant--an artist who has painted her portrait--yields to temptation.
Nancy Glenn is a pupil in Pop Hogland's school for crooks. When, attired as a boy named "Spider", Nancy fails at her lessons as a pickpocket, Pop decides to pair her with Pliny Drew, a graduate thief and swindler.
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.
An actress poses as an heiress who died, and dies fighting blackmailing detectives in a burning house.
In Africa a typist is framed for killing a diamond smuggler who betrayed her father.
Most of the scenes are laid in a parrot-and-monkey country in South America, a land where "it is always after dinner." The Llano Kid, a Texas bad man, flees there from justice. The consul persuades him to play the long-lost son of a Castilian family, and tattoos a coat of arms on the back of the Kid's hand to make the deception complete. The Kid is taken into the household, trusted and loved by the gladdened mother. For the first time he has a home. The romance develops. And when the time comes to rob and flee he has too much manhood to break the loving mother's heart. The surprise comes when it is revealed that the man the Kid killed in Texas was the real son.