The Knife

Wealthy New York contractor Wilton Demarest falls victim to the wiles of beautiful adventuress Mazora. Soon, he becomes addicted to drugs, neglects his wife and child, and his business is on the verge of ruin. By chance he meets his double, western mining engineer Martin Stanley. Demarest, half mad due to his drug addiction, conceives the fantastic idea of having Stanley take his place in the world enabling him to indulge in his degraded desires. Stanely, penniless and alone in the world accepts the proposition despite his reservations. Demarest drops into oblivion and Stanley picks up the scattered threads of his life, both in business and at home. The "at home" part is what causes complications.

Rich wastrel Baron Chevrial fritters his days and nights away pursuing a series of young lovelies and playing with their affections. He is smitten with the charms of Rosa, dancer of the Opera Comique, but marries the prominent Therese Beauchamp while still remaining involved with Rosa. Eventually a new woman enters his life and for a time he is oblivious to everything else until Rosa reenters his sphere.

Joyous Johnson is expelled from college and finds work as a publicity agent for the Coronado Hotel. At the hotel, he falls for Marjorie Milbank, a businesswoman visiting to discuss the sale of her Texas cattle ranch with Joyous's father. Unknown to Joyous, his father desperately needs Marjorie's ranch to save his failing packing house, but she refuses to sell. Joyous must navigate his new job and his father's business crisis while trying to win Marjorie's heart.

Nekhludoff, a Russian nobleman serving on a jury, discovers that the young girl on trial, Katusha, is someone he once seduced and abandoned and that he himself bears responsibility for reducing her to crime. He sets out to redeem her and himself in the process.

Faced with the tragic responsibility of choosing between the happiness of her 16-year-old daughter Pamela or saving the life of an innocent man, Marie Baudin's first impulse is to sacrifice all for her own. But she has second thoughts that bring complications to all.

When Bob Stratton returns from war in France, he soon discovers his ranch in the hands of a pretty girl, Mary Thorne, who explains that upon her father's death she became the sole owner. Thorne had been the executor of Stratton's will, and thinking that Bob had been killed, he had appropriated the place for himself.

Defying her obdurate Colonel father Betty Lewis elopes with Bob Hale. When Bob is killed in an automobile accident, the colonel discovers Betty is pregnant and after the birth cruelly tells Betty that the baby died while placing the child in an orphanage. When Betty later marries Ken Tyler she stays silent about her previous marriage, at the colonel's request. One day while visiting an orphanage with her sister, Barbara, who hopes to adopt, she finds her own daughter. Taking her home she admits to Ken the child's true parentage. Angered at first, he is persuaded by his own mother and accepts the child.

Poverty forces Jill Mackie to work in a department store, where she falls in love with its owner, Charles Hemingway. They form an illicit alliance when Mrs. Hemingway refuses to grant Charles a divorce. Eventually, Hemingway becomes ill and dies, leaving Jill a sum of money. She leaves the country and falls in love with a young man to whom she confides her past, but breaks with him when he suggests that they make a similar arrangement.

While engaged in battle, Pierre Duval, a French soldier, stumbles onto the mortally wounded Count de Morave. Before dying, the count begs Pierre to deliver some family jewels and papers to the Vicomte Raoul de Reyntiens. At home, Pierre places the jewels in a box that also contains a necklace given to Margot, his wife, by the Duke D'Auberg. While stealing the box, Lazare, a war correspondent who witnessed Pierre's scene with the count, attacks and kills Margot. Found guilty of the crime, Pierre is sentenced to life imprisonment but is pardoned after performing a dangerous jailhouse rescue. Mavis, his daughter, who has been adopted by the duke, falls in love with the poor vicomte but is courted by Lazare, now posing as the Count de Morave. To win her love, Lazare gives her some of the stolen jewels, including the duke's necklace, but when Pierre sees the necklace later, he exposes Lazare and wins retribution.

Orphaned Gertrude "Gertie" Flint is rescued by lamplighter, Trueman Flint, who raises her with faith and virtue until she grows into a moral woman and finds love with a childhood friend, overcoming hardships like her blind mother's separation from her and near-fatal fire incidents, ultimately leading to happy reunions and an engagement.

Conchita Cordova sings in the cathedral choir in her village of San Miguelito near the Rio Grande. Millionaire oil man John Rannie, whose oil fields have displaced the peasants, desires Conchita, and when he learns that her fiance, Juan Mendoza, has been employed by Adolf Wylie, a German spy, Rannie threatens to expose Juan unless Conchita gives herself to him.

After being disinherited by their wealthy father for their wild and irresponsible ways, two brothers embark on vastly different paths. One turns to crime and the other follows the straight and narrow falling in love along the way. When their paths cross again both find their lives in danger and only one will emerge safely.

John Weston leaves his wife and kids to marry adventuress Doris Clark and loses his mind when he realizes his mistake. A lost film.

Former Viennese orchestra leader Anton von Barwig has been searching for his daughter, taken by his ex-wife, for many years. The search has reduced him to penury since a crooked detective swindled him. One day he meets a young society girl, Helene Stanton, seeking music lessons for her fiancé, Beverly Cruger, and recognizes her as his child. Barwig finally confronts her foster father, who had run away with his wife in Vienna, who pleads with him to stay silent for his daughter’s future. He acquiesces but Helene discovers the relationship and brushes social considerations aside to be reunited with him.

Unscrupulous stockbroker George Howard convinces Robert Sterling that he is having an affair with Robert’s wife Helen aided by Robert’s former flame, Rita Lawson who wants him for herself. Though Robert believes the lie, divorcing Helen and gaining custody of their child, Helen still wants nothing to do with George. Mad with desire he kidnaps her daughter and demands Helen sleep with him for the girl’s safe return. Forced into a corner, Helen agrees but once her daughter is rescued a struggle ensues with George and he is shot dead. Helen, cleared of wrongdoing reunites with Robert who has realized his folly.

A cabaret hostess falls for a young aristocrat, ignoring her friend's warning that the affair will end in heartache.