The Princess of Happy Chance

Mary Sundale is a young woman who spurns her childhood sweetheart to attach herself to a large group of riotous, semi-artistic young people and becomes infatuated with a superficial poet and critic. One night this poet becomes too bold in his advances and is thrashed by the man who has been rejected. On a later night, the group holds a party in a dirigible. The ship crashes and fear grips the revelers. Mary, now disgusted with the group and all it represents, mends her manner of living and plans a future with the man who has always sincerely loved her. A lost film.

Gennaro, the son of Lucretia Borgia, lives unaware of the identity of his mother, who has married the Duke of Ferrara. After Lucretia's brother is killed by five conspirators, the fathers of Gennaro's dearest friends, Lucretia tortures the old men to death. Later, Gennaro and his companions journey to Lucretia's domain, and she sees her son for the first time. The Duke, who believes him to be her lover, poisons him, but Lucretia administers the antidote in time and saves his life. Then she schemes to poison her sons' five friends for their fathers' mistake.

A boy takes pictures of everything, including some embarrassing situations. When he projects the pictures on a wall for everyone to see, his father spanks him and smashes the camera.

Suffering from aphasia after being conked on the head, a man is coerced into robbing his fiancée's home.

A nobleman wishes to help the woman he had seduced and abandoned years earlier when he learns that she is now on trial for murder.

Wilton, a hunchback, who was always scorned and ridiculed by women, returns from Java a rich man after having discovered a diamond mine. He romances Gina, who is on the rebound from a broken affair, and showers her with expensive gifts. After Gina reconciles with her boyfriend, she continues to see Wilton because of what he gives her. After he discovers her perfidy, Wilton develops a poison and mixes it into her lipstick, which will kill any man who kisses her. Lost film.

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...

An actress poses as an heiress who died, and dies fighting blackmailing detectives in a burning house.

Returning to his father's cattle ranch after the excitement of serving in combat overseas, Bud McGraw becomes restless, and his father decides to send him to an old friend who commands the Border Police in Texas. On the way he meets Peggy Hughes, accompanying her Uncle Graham, a customs inspector, and he retrieves her hat from the rails of a train. At the headquarters, numerous scrapes and fights win him the admiration of, and friendship with, the men. Lazaro, a Secret Service agent, invites Mrs. Graham and Peggy, who are staying at the border station, for an automobile ride, and they are captured by bandits and held for ransom. Bud and his pals deliver the ransom and discover that Lazaro is the bandit chief. Lazaro refuses to release Peggy, but a jealous rival, Nita de Garma, causes his downfall and shoots him as the Border Police arrive to rescue the party.

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.