Franklyn Starr, a talented and wealthy young musician, suffers a double misfortune in the sudden loss of his hearing and in the death of his Mother to whom he is deeply attached. He loses his generous, joyous nature and transforms into a gloomy and despondent misanthrope.

Dorothy Cruickshank is secretly in love with Captain Westwood, whom her parents have never seen, and they plan to elope. Her father, an old sea captain, has quarreled with a Professor Jogram, following a public denunciation of a book Jogram has written on navigation.

A wealthy bloater magnate looks for his lost son. His daughter sees a ragged man (Walter) at a construction site with the family birthmark and brings him home. Soon he finds himself in a strange dynamite duel with an excitable Frenchman.

The conflict between the Secret Service and a powerful combination of crooks who would wreck society. Every known device is employed in the pursuit of crime and of crime detection: Underground tunnels and secret vaults under the bay, chests of jewels and disappearing walls, submarine dips and airplane fights - these are just a few of the thousand thrills that sprinkle the action of... The Invisible Hand!

Lt. Col. Anstruther vies for the attention of Muriel Mannering with Major Bingham. The latter tricks Anstruther into believing that the girl loves Bingham, when in reality she has refused the major's proposal of marriage. When Anstruther saves Bingham's life during the Boer war, the deceitful major finally tells the truth.

Margot is the pawn in a game set up by her father, "Old Bill" Prewitt, and her husband, Tom Sloan. They use her to fleece gamblers until a gun fight results in serious injuries for both Tom and Bill. Bill thinks Tom is dead and takes Margot across country. He finally collapses from exhaustion and they are found by a trapper.

Just before a big bout, Jimmie, a New York prize fighter, gets a lucky medal from his friend Billy. Herman Marlex, a chronic teller of tall tales informs Jimmie that the medal is really a royal one, worn by the infant Prince of Magonia when he was kidnapped years before. Then, on fight night, Jimmie is knocked senseless. On his way home, Magonian emissaries see him wearing the medal, and so haul him back to the "homeland." Despite his insisting that he is merely a boxer, Jimmie is hailed as the returning prince.

Just before a big bout, Jimmie, a New York prize fighter, gets a lucky medal from his friend Billy. Herman Marlex, a chronic teller of tall tales informs Jimmie that the medal is really a royal one, worn by the infant Prince of Magonia when he was kidnapped years before. Then, on fight night, Jimmie is knocked senseless. On his way home, Magonian emissaries see him wearing the medal, and so haul him back to the "homeland." Despite his insisting that he is merely a boxer, Jimmie is hailed as the returning prince.