To get over a breakup with his actress girlfriend, a playwright goes on holiday to a lakeside resort, where he meets a strangely mismatched couple, a man and his much younger wife. He and the wife begin an affair, during which she introduces him to some of the darker aspects of romance.
Qi can't stand the family she's been married into tries to escape. On the day that she escapes, her sister-in-law is killed by her nephew. Qi becomes a suspect and is arrested. After being released from prison, Qi decides to take revenge on society. She makes a living betraying her lust and hangs out in various places with unconventional people. She meets Zou Wenlan, and the two fall in love and plan to start a new life together. However, the Zou family strongly opposes the marriage, and the two are separated. Qi jumps into the sea and commits suicide. Facing Qi's tombstone, Zou Wenlan and and his family are full of sorrow and repentance.
During World War I, Jeanette Gontreau becomes a "godmother" to three Allied soldiers imprisoned in a German camp. Describing herself as an old woman, she sends them cheerful letters and baskets of small gifts until one of the soldiers, Harry Ledyard, informs her that he has been released and will visit her in New York. Panic-stricken, Jeanette dons a wig and spectacles, and although she convinces Harry that she is old and gray, she soon falls in love with him. Harry worships his "godmother," and when secret service agents discover coded messages on her letters, he shields her by assuming the blame.
During World War I, the beautiful and patriotic Leslie Selden is courted by two ardent admirers: Jack Wynn, a young man not yet taken by the draft, and Dr. Wolff, a Danish scientist who, in reality, is a German agent. When Jack learns that Wolff is masterminding a plot to bomb several munitions factories and destroy the water system in New York City, he goes to the spy's home and confronts him.
A man is so impressed with the philosophy of survival of the fittest and the rights of the strong against the weak that he tries to put these principles into practice in his own home.
When Roberta Carruthers' father, Capt. Carruthers, is killed in France during the war, she comes to live in the US with her uncle. When she finds out that her uncle is under the impression that his brother had a son and not a daughter, she decides to disguise herself as a male, and calls herself Bob.
Coddled by his maiden aunts and apparently unable to make decisions, Oliver Wendell Blaine signs up for a mail-order course in "Success." Oliver follows the instructions step by step, builds his self-confidence, and proves himself a hero when a log jam threatens the town. He is made river boss and marries Phyllis Thorpe, daughter of the owner of the lumber-mill.
Jack Banning is a motorcycle cop by day and undercover agent by night. Disguising himself as "Strongarm Samson," Banning infiltrates a gang of smugglers headed by Richard Courtney.
A rich girl's fiancé poses as a chauffeur to stop her eloping with a major.
An American munitions manufacturer and his son become ensnarled with enemy agents from Germany during the First World War.
Sir Joseph and Lady Webbing are the foster parents of Marie-Louise. The couple are also in league with Verrinder, a German spy. When their work against England is discovered, they commit suicide. Marie-Louise, who has been an unwitting part of their schemes, is allowed to go to the U.S. if she promises to keep everything a secret.
Loyal slave of the aristocratic Dabney family, Dan is overjoyed when Raoul becomes engaged to Northerner Elsie Hammond and his sister Grace becomes engaged to Elsie's brother John. When the Civil War breaks out, the heartbroken Hammonds return North and John joins the Union army. Raoul joins the Confederacy, but his vindictive overseer, Jonas Watts, becomes a Union officer. Watts takes Grace prisoner, but before he can act on his desires, John rescues her.
Young millionaire Turner Brooks is engaged to marry the poor but sweet Dora Carton however the maliciously rapacious Emma DeWolf wants to snag him for his money. Both before and after their marriage Emma tries every means to poison his mind against Dora but ultimately fails.
Until her rescue by a Salvation lass Margaret Reeves is trapped in white slavery. Upon her escape she is sent to a ranch where she falls in love and marries a cowboy, keeping her past secret. The man who once owned her appears and her husband learns the truth. He sends her from the house, but a young Indian mother engineers their reconciliation.
Blind Eleanor is cared for by her father's friend and eventual lover, Burton Lester, who arranges a sight-restoring operation. Upon recovering her sight, Eleanor discovers Burton is married, leading her to seek independence by completing her father's art and becoming a renowned artist in New York. After a misunderstanding involving a lost necklace and Burton's kindness to a friend, Eleanor reconciles with Burton and they become engaged.
Bertha Sloan loses her job as a sewing-machine girl and subsequently is employed as telephone girl with a lingerie manufacturing company. She soon falls in love with the assistant shipping clerk, Roy Davis, and is promoted to chief model for the firm, owing to the patronage of Morton, the wealthy and wicked manager. Bertha is about to take a position in Paris as designer when Morton lures her to his home.
A prosperous small-town peddler accedes to his family's wish to move from their secure existence to the uncertainty of New York City. It proves fruitless and eventually his kin sees the error of their ways and return to their true home.
Quarrier's rival Robert Lester schemes to have the engineer imprisoned, but the government pardons him so he can oversee a project vital to the country's growth. On the job, Quarrier once again meets Lester, who has tricked Alberta Bradley into selling him the land which is to be used for the project. Alberta still feels as if the land is her own, and threatens to kill the first of Quarrier's workers to swing a pick into it. Quarrier himself begins digging, and while she is unable to kill him, she vows to hate him forever. Gradually, their relationship softens, and the two come to love each other, with Alberta acknowledging the worth of Quarrier's project. Then, working together, they expose Lester to government authorities, since he has been plotting to keep all of the project's profits for himself.
Two apprentice violin makers are in love with the same girl, who happens to be the daughter of their mentor. A violin competition is scheduled, with the winner being the one who will marry the girl.
Noble born Mignon is stolen by a band of gypsies as a child. Her mother dies from grief and her father, unhinged by the double blow, gives up his ancestral home for the roaming life of a minstrel wandering from place to place in search of his child. Ill-treated by the gypsies in time she is rescued by traveling student Guglielno, with whom she falls in love. But he is enamored by the seductive actress Filina. Events come to a climax at a castle where all the participants meet, and drastic actions lead to near fatal consequences until all is resolved happily.