Society matron Mrs. Fanshaw Renwick entertains lavishly at her posh home. Living with her are her two daughters, Phillipa, a madcap eighteen-year-old, and her married sister Errica who is having an affair with Ralli, a designing South American. When Captain Chantry arrives with an impressive letter of introduction, Mrs. Renwick welcomes him while Phillipa falls in love with him. On the night of the masquerade party, Phillipa induces Chantry to take her to the party in disguise, because her mother will not permit her to attend. The captain, in reality a jewel thief, readily complies, believing it will provide him with the perfect opportunity to steal Mrs. Renwick's famous pearls.

In the act of robbing a set of rare jewels from a museum, a robber is wounded in the hand. Prentice Tiller, while dressing a wound in his hand, overhears the woman in the next hotel room, Gertrude Temple, telephoning Aaron Molitor, to whom she is to deliver some jewels. Posing as Molitor, Prentice calls on Gertrude but disappears when Molitor, who also has been wounded in the hand, suddenly arrives. Molitor's men capture Prentice, who narrowly escapes death in the ruins of an old church and then continues to track Molitor.

During World War I, young Dorothy Grant comes home from finishing school and informs her parents that she is going to contribute to the war effort by organizing a "Girls Aviation Corps". She has uniforms made and hires a veteran of the Spanish-American War to teach her "cadets" military routines and drills. Her father owns a munitions factory and is always telling her to be on the lookout for spies. She convinces herself that the family butler, Williams, is a spy because he cuts his grapefruit in an odd way. It turns out that Williams isn't a spy but the people whom Dorothy least suspects are in fact spies, and they discover that Dorothy knows the password to get into the factory after hours.

An English naval officer and a Corsican youth have a duel, and the Corsican is killed. The young man's sister, Marina Paoli, swears vengeance on the killer. Mr. Barnes of New York, who happened to see the duel, finds the name Gerard Anstruther engraved on the pistols.....

Mormons capture women for their wives in this silent anti-Mormon propaganda film featuring the original organ music.

Molly is a wife of wealthy Britisher Sam Thornhill. Though devoutly loyal to her husband, the capricious Molly can't seem to avoid getting herself into compromising situations. The limit comes when a pair of Molly's stockings find their way into the boudoir of another man.

John Constable, a writer, falls prey to the designs of scheming widow Margaret Alloway to the dismay of his young wife Kitty. Feigning interest in John's work, the widow offers to collaborate on his new book, Women's Struggles , but when she convinces him to dine with her on Kitty's birthday, the neglected wife decides to retaliate. After attending the opera with handsome bachelor Harry Travers, Kitty accepts an invitation to share supper in his rooms, leaving a note for her husband. Aware of Harry's questionable reputation with women, John panics, but by the time he arrives at Harry's apartment, Kitty has disappeared. Following a series of incidents in which the widow, her suitor Teddy Sylvester, Travers, and the Constables are discovered in compromising situations that actually are innocent, John realizes that he far prefers Kitty to the widow and again becomes a loving husband.

An important customer at Armande's, where Iva Seldon works as a model, is Billy Ravensworth, who purchases expensive gowns for a heartless vampire named Rita Challoner. When Billy pays for a number of gowns with a bad check, Iva is sent to Rita's home to collect the finery, and there she meets Bertrand Seldon, whom she recognizes as her own father, a society man who had deserted his wife years earlier and never acknowledged Iva. Rita learns that Billy is poor and breaks off their affair, after which Iva persuades him to pose as her fiancé so that she might enter society. Billy is content to maintain the masquerade in exchange for Iva's money, but soon finds himself jealous over her apparent romance with Bertrand. Iva agrees to accompany Bertrand on a drive, but the car plunges down a cliff, whereupon she reveals her identity. Before his death, Bertrand at last recognizes his daughter, and with his fortune, she and Billy begin a new life.

Japanese poet Akira living in Tokyo, loves American Ruth Vale, who was placed in the care of Akira's father when her missionary parents died. Ruth returns Akira's affections until she meets Edward, but the American proves an unfaithful husband. Three years later, Ruth is gravely ill while Edward amuses himself with his new lover, Adrienne Chester, but Akira comforts the dying woman with the promise that he will protect her little daughter Blossom.