The Diamond Man

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.

On the trail of counterfeiters Detective Craig is on their trail. Suspicion falls on James Dalton who passes bad money through unsuspecting "fences." Dalton plants bad bills on young Bob Brierly and when it is detected Dalton, as usual, escapes while the innocent Bob is caught and convicted. Upon his release Bob meets Mae Edwards who gets him a job in her bank. When Dalton comes to the bank to case it for a robbery he runs into Bob and tries to recruit him as an accomplice. Bob, who has married Mae, refuses. Dalton causes him to lose his position and because of Dalton’s persistent efforts forces Bob to join the crook. Craig, shadowing Dalton, knows Bob is taking part against his will. Craig foils the robbery and after a motorboat chase Dalton is captured and exonerates Bob.

Winthrop Clavering a mystery writer, is continually ridiculed for the fiction of the crimes he depicts, so he decides to solve a case himself. To that end, he determines to find the slayer of Pedro Alvarez, who whispered before dying that his assailant was a woman. At the City Refuge for Homeless Girls, Clavering obtains the assistance of Margaret Holt, the sister of Victor Holt, the district attorney. Margaret, it is revealed, was abducted by Juanita, a member of a gang of white slavers led by Alvarez. After escaping from a brothel, Margaret became Alvarez' stenographer, hoping to gather secret information on his gang. While searching for evidence, Margaret was surprised by Alvarez, whom she killed. Finally, Clavering captures the gang, clears Margaret, and encourages her romance with cub reporter Jack Howell. This film is presumably lost.

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.

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.

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 reporter and a detective team up to solve the murder of a nightclub singer who had been involved in a divorce scandal.

Millionaire Joshua Barker insists that his daughter, Faith, must marry Phil Langhorne, a man that neither likes, and Faith is in love with and eager to marry her childhood sweetheart, John Temple.

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

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

Secret of St. Job Forest

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

Villainous convict Ralph Vickers plots against a Mill owner Mr. Lucas. Vickers works to undermine Lucas while pursuing his daughter, Geraldine. Vickers' schemes are eventually thwarted by the mill’s office boy, who manages to baffle the villain's designs.

Young Victor Jones of America is discovered to be an exact lookalike for England's Earl of Rochester, a circumstance which results in Jones deciding to replace the Earl after an unfortunate accident.

A doctor who cannot figure out what is wrong with his patient refers him to a detective, whom he hopes will be able to discern the cause of his mysterious illness.

The Gray Ghost is a 1917 American crime-drama film serial directed by Stuart Paton. Chapters: 1. The Bank Mystery; 2. The Mysterious Message; 3. The Warning; 4. The Fight; 5. Plunder; 6. The House of Mystery; 7. Caught in the Web; 8. The Double Floor; 9. The Pearl Necklace; 10. Shadows; 11. The Flaming Meteor; 12. The Poisoned Ring; 13. The Tightening Snare; 14. At Bay; 15. The Duel; 16. From Out of the Past.

Allen Bancroft of Lancashire is framed by criminals leading to his imprisonment and subsequent struggle to clear his name and find work, all while facing coercion from the same criminals.

Having misused funds held in his trust by investing them with his friend, Henry Lowe, Robert Reardon appeals to his future son-in-law, James Calvin, a candidate for the position of district attorney, for help. When Calvin threatens to indict Lowe for fraud if he is elected, Reardon's anger becomes so great that the engagement between Calvin and Reardon's daughter Helen is broken, resulting in Reardon's suicide. After Lowe comes into possession of a check forged by Helen's brother Jack, he uses the document to force a marriage with Helen. Treated brutally by her husband, Helen seeks Calvin's aid, but Lowe frames Calvin, now the district attorney, in a compromising situation with his ex-fiancée. Calvin is about to resign when Helen traps her husband with some marked money, causing his suicide through disgrace. Thus freed, Helen and Calvin find happiness together.

Denounced for preaching socialism Reverend Frank Gordon founds his own "Temple of Man." financed by Kate Ransom, the woman Gordon has fallen in with love and entered into a common-law agreement with after divorcing his wife. With the outbreak of World War I, however, the members of his new congregation oppose conscription while he wholeheartedly supports the Allied cause. Driven from his own church, he returns home to find Kate in banker Mark Overman's arms, enraged he strangles the banker. Sentenced to life imprisonment, his ex-wife Ruth pleads with Governor Morrison to pardon the errant clergyman. Gordon is allowed to return to his family.

The rehabilitation of "Chicago Sal," a lady crook, is seemingly realized when probation officers send her to the country home of Steve MacLaren to work off money stolen from him by her partner. She falls in love with MacLaren and is accepted as a member of the household. Unable to resist the temptation, however, she leaves the farm with two former colleagues when they come to visit her. MacLaren follows her to the city. She commits a crime; he helps her escape but is himself arrested for vagrancy and sent to jail. Sal returns to the country and promises to wait for him.