The Isle of Doubt

Debutante Hope Merrill returns home one day to find her financier father Amos Merrill on the verge of committing suicide. Rather than reveal the truth -- that he has misappropriated funds from his own company -- Merrill claims that he has been ruined by young John Cook, Hope's sweetheart.

Thurlow Michael Barclay Jr., a bookish mathematics professor, is asked by his father to inspect his mine in Kentucky to determine why it's failing. He discovers love with a local girl named Sally and a plot to destroy the mine by local villains.

A conservative young man inherits his uncle's pearl fishery concession in the South Pacific. Upon his arrival there, he becomes involved with a woman and a mystery.

An actress weaves her web, like a disgusting spider, around a susceptible young man, lures him away from his sweetheart, and eventually destroys him.

Sylvia, a model in the shop of a fashionable dressmaker, is introduced to the Hicks family, which recently has acquired a fortune through iron ore deposits discovered on their farm. Octavia Hicks sees in the cultured but unpretentious Sylvia a good match for her son Henry and invites the young woman to visit the Hicks home. Two other visitors, Frank Hayward and his accomplice Annie, are masquerading as a count and a princess in order to con the country-born millionaires out of their money. The two are introduced to Sylvia, who soon discovers their plots and exposes them. A mysterious foreign gentleman appears and announces that the fashion model is actually the Princess Sylvia of Karalyn, but she renounces her title to marry Henry.

Engrossed in his business affairs, John Kirby fails to assess the seriousness of his wife Helen's objections to the constant parade of business chums and their mistresses who come to dinner. When Kirby gives Helen the ultimatum of accepting the status quo or filing for divorce, she divorces him and obtains a position as a stenographer in the office of one of her husband's friends, but leaves after he makes advances toward her. Finding employment as a model in a dress shop, Helen is invited by one of the girls to attend a masquerade ball with two gentlemen friends. Helen agrees and discovers that her escort is her ex-husband. Although he cannot identify Helen because they are masked, Kirby suspects that his date is his ex-wife and arranges for another meeting in which he asks Helen to remarry him, and she agrees to make him her second husband.

"The Devil's Dansant" is the nickname given to a dansant of which Dominique, a Frenchman, is the proprietor. District Attorney Farrar, while searching for evidence on which to raid the place, is astounded to find that his wife Valerie, is a frequent visitor at Dominique's. The willful woman disobeys her husband's orders and continues to visit Dominique's.

Virginia Lee, daughter of a United States Senator, meets David Starr, a wounded United States soldier, in a field hospital in which she is serving as a Red Cross nurse. Star returns to the trenches and Virginia's base hospital is moved. Starr is again wounded and invalided home. Virginia has lost sight of him. She returns to America; and in Washington, Starr sees her at a ball at the French Embassy. Feeling her too far above him, socially, he goes West, whither Virginia's father takes her, on a business trip, and there a vital drama is enacted.

A series of 2-reel thrillers in which a society girl has a position as a special investigator for the police and works on various cases where her unique talents can help to solve crimes. Each episode is complete in itself.

When a neighbor complains about strange noises, an officer goes undercover to investigate Dr. Jardine. After her cover is blown, she infiltrates his lab and stops him from performing an illegal surgery on an escaped convict.

Twin sisters Fanny and Evelyn Craig are unaware that their stepfather, Micah Parrish, is a fake spiritualist until his lack of money forces them to return home from boarding school. Evelyn eagerly assists Parrish and his even more unscrupulous partner, Esau Brand, while Fanny, disgusted, leaves home to become lawyer Bruce Taunton's secretary.

As heiress to a large fortune, Marguerite is able to satisfy her love for beautiful clothes and a taste for adventure, while confronted by a multitude of schemers and gangsters bent on reducing her to poverty.

Prior to the declaration of World War I, dancer Varda Deering was a member of the Austrian secret service, but later became a loyal citizen of the United States. In America, she captivates many men but cares for none of them until she meets Lieutenant John Long. At first, he regards Varda as little more than a social butterfly, but gradually comes to recognize her goodness and falls in love with her. While John is away on a war-related diplomatic mission, Varda agrees to aid the U.S. Secret Service in procuring classified documents from August Von Grossman, an agent whom she had known in Austria.

Foreign powers keep getting their hands on U.S. military secrets, so the head of the American diplomatic corps calls in his nephew Dick Stansbury to help. Stansbury knows that Doctor Montell is at the bottom of this, so he poses as an inventor of an innovative aerial gun. This sparks the doctor's interest, and when they both attend a weekend party at the Ryerson estate, Montell tries to get Stansbury to sell the gun to his country.