Louis and August Siever, the twins sons of a German father and American mother, are traveling in Europe when war breaks out. August joins the Kaiser's army, but Louis, a supporter of the United States, is practically made a prisoner in Berlin for a year while he tries to prove his American citizenship. After a violent confrontation with Louis, August steals his brother's passport and leaves for New York with Gerda Anderson, a German spy.

Lois Fox, upon whose shoulder is branded a Chinese idiograph resembling the letters "A. Y.," is rescued from a gang of Chinese ruffians by Brice Ferris. His servant Ming, in attempting to steal from her finger a ring that bears a mysterious green seal, is killed, and soon afterward a stranger named Strang arrives, also in search of the girl. Despite Brice's efforts to protect her, Lois is abducted and taken to the headquarters of Lao Wing, the leader of a secret Chinese society known as the Tong.

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.

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.

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.

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 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...

Young London realtor Leonard Tavernake becomes involved with two sisters, one good and one evil, which leads to much melodrama but things work out in the end.

Chaney plays two roles: mad scientist Arthur Lamb and Lamb's "experiment", known only as the Ape Man. This hideous creature was the result of Lamb's attempts to transplant animal glands into human beings. A lost film.

Penniless aristocrat Yvonne Dupré ekes out a living selling her paintings to a crooked dealer, Leon Naisson, who passes them off as other more famous artists. Leon confides to his unscrupulous model Romildo, that he is attracted to Yvonne. Romildo drugs his lover, fiery Apache dancer Juliette who closely resembles Yvonne, then tries to extort money from Leon to have his way with her. Leon discovers the duplicity but convinces the artist's sweetheart, Dick Gray, that she has been unfaithful. As police close in on Leon, he frames Yvonne by planting forged paintings in her studio. Following Yvonne's arrest, Juliette is informed by her foster sister that she was stolen by gypsies as a child and is actually Yvonne's twin sister. Juliette exposes Leon's operation to the police, reuniting Yvonne and Dick.

When Harlan Carr inherited his Uncle Ebenezer's "Jack-O Lantern" house and too his bride there to live, he found himself the unwilling host of a score of hungry relatives within a week. Soon, strange things began to happen. A black cat made the house his headquarters, unexplained sounds could be heard and a shadowy figure floated through the halls at night.

Retired actress poses as dresser to scare murderer into confessing and clearing her son.

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.

On the American frontier in the last decades of the 19th century, Billie is a female cowboy who fights a series of bad men in this film serial.

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

Ranch foreman Kerry has boarded with Kitty Tynan and her mother for five years in western Canada, his past is a mystery to everyone. He is actually an English aristocrat who lost all his money gambling and left the country in search of work. Kerry and his friend Horan own an option on property which crooked lawyer Burlingame is trying to secure. Burlingame's cohort Logan murders Hogan, and is caught and arrested. In the trial, Burlingame forces Kerry to admit his past, and succeeds in preventing Kerry from receiving bank assistance. When Kerry is shot, Kitty opens a letter from Kerry's wife that he had been carrying for five years, and cables her. Kerry's wife arrives and informs him that his last bet in England had turned out to be a $20,000 winner. Kerry is able to use the money just in time to foil Burlingame and secure the property, thus winning prosperity and the affections of his wife.

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

When his buddy is murdered a dedicated cop, goes after the gang responsible.

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.

A man tries to burgle his own safe on the same night that a professional criminal attempts it.