Captain Nemo has built a fantastic submarine for his mission of revenge. He has traveled over 20,000 leagues in search of Charles Denver - a man who caused the death of Princess Daaker. Seeing what he had done, Denver took the daughter to his yacht and sailed away.

Hartley, fascinated by the vampish Leonie, steals and serves a term in prison. Not satisfied with this downfall, Leonie again works her womanly charms upon Dr. Gerald, who is engaged to Johanna, the adopted daughter of Dr. McLean. Learning of the woman's designs on the young doctor, Hartley denounces her in Gerald's presence. In response, Gerald foolishly renounces Johanna and his friendship with Dr. McLean. However, when Leonie discovers that Johanna is her own daughter whom she had deserted as a child, she becomes conscience-stricken, gives up the young man and begs forgiveness.

First National gala celebrity banquet with stars.

Jules, the son of French General Bleriot, agrees to give a masked blackmailer his father's secret military papers when threatened with exposure of his gambling debts. Masked, Jules steals the papers, but during a struggle with his father, Jules receives a knife wound in his arm.

Inventor George Grant and his partner, financier John Benson, accept an offer of $200,000 for the rights to an invention. After Grant breaks up a fight in a bar between drunken Dave Wilson and an old man reprimanding him, Dave is told by his mother to apologize to Grant. He meets Benson, who witnessed the fight, outside Grant's apartment and tells him his purpose, but during Dave's conversation with Grant, Grant suddenly drops dead. The police find Dave hiding, and after a pistol is found outside and Benson tells them about the fight but says he knew nothing about Dave's apology, Dave is convicted of murder and electrocuted.

The enemy's success in smuggling a spy through the lines places the Stratiria armies in a dangerous position. The spy is intercepted and killed by Pettrus Baariot, the telegraph operator, who then succeeds in sending a message that saves the Stratiria forces from defeat. For his heroism, Pettrus is promised a promotion, but after his recovery from his severe wounds, he is humiliated through the treachery of Danick Rysson, a government official who desires to marry Floria Natarre, Pettrus' beloved. Bitter, Pettrus listens to the overtures of one of the enemy and steals the new telegraph code.

Self-made man Emerson Boyd of Every-town owns the Boyd Mills, which uses child labor and disregards health regulations, and the Boyd Chemical Company, which manufactures harmful patent medicines. Crooked politician David Duncan, the mills's general manager, misinforms Boyd about factory conditions. After Boyd's beloved daughter postpones accepting the proposal of Matthew Brand, an unambitious rich young man, until he does something for humanity, Matthew reads an exposé of the mills by editor Clifford Cole. He buys Cole's newspaper when Boyd attempts to stifle it and supports the National Tuberculosis Society's proposal to build a sanitarium in Every-town to combat the rise of tuberculosis.

A professor seeks to prove life after death by reviving a dead body.

When Dr. Carson marries Daphne Standing among the guests is her former suitor, Laurelton. The couple are happy but as Laurelton's jealousy grows, he gets drunk and decides to have his way with Daphne. He leaves an urgent phone message for Carson to hurry to his office because of an accident. Watching him depart Laurelton tries to enter the apartment but Daphne takes refuge in a locked room calling Carson who rushes home and finds Laurelton trying to break into his wife's room. They fight until the police intervene but when Carson opens her door Daphne, believing he is Laurelton, shoots him. His injury is minor, and the officers take Laurelton in charge.

Don Fernando, smitten with Giulia, a Spanish dancer, persuades the young and innocent girl to run away with him. Valeska, the sister, finds a note on the table the following morning, telling her that Giulia has gone, never to return. Months later, however, Giulia returns to her home, having been deserted by her unfaithful lover. Giulia enters the convent. The sister meets Don Fernando some time later. He tries to influence the girl to marry him. Don Fernando's life is saved by Sister Valencia, who interferes just as Valeska is about to stab the villain. Valeska is later thrown into a dungeon by Fernando, who declares he will '"have her." The pretty Spanish girl does not stay in her prison long. Sister Valencia, discovering Valeska's whereabouts, gets her out of her prison in a clever way. Valeska then enters the convent, where her sister is overjoyed at the happy meeting, and ending.

Although she is secretly in love with Wade Clayton, Laura Sheldon accedes to the wishes of her parents and marrries George Baring. Soon after, war breaks out between the North and South, and Clayton is made captain of the regiment. The entreaties of Laura prompt Baring to enlist against his will. Seized with fear during battle, Baring attempts to run away but is shot by a comrade and left for dead. At the finish of the war, Clayton returns home and relates how bravely Baring died in action. A few years later, Baring, who had been hiding in Cuba, returns.

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Dr. Spencer sends Lester Jordon to spend a few months in Tennessee for a rest. The school trustees employ Ruth Overholt as teacher for the Sumach Crossroads School. The townspeople suspect Lester is a Revenue Officer and want to get rid of him. When Clem, a man who had argued with Lester is found shot in the woods the news spreads that Clem is responsible. He is carried to the town, with a rope about his neck, to be lynched. Ruth is frantic, but helpless until she can convince the townsfolk of his innocence. Lester is released and with Ruth, he returns to civilization.

A young society man invites an old derelict to his apartments and gives him a big dinner, he tells the old fellow he should steal rather than go hungry, and fills his mind full of false sociology. The old fellow, acting on the advice, tries to steal from his benefactor. There is a desperate struggle, at the close of which the police come, and the derelict is allowed to go.

When, after three years of active service, ace detective Jerry Brennon is ordered by his doctor to take a rest, Senator Reed, Jerry's staunch supporter since he arrested two crooks burglarizing the Reed home, prevails upon the detective to stay at his cabin in the mountains. Warned that the cabin is haunted, Jerry's suspicion is aroused when a bullet whizzes past his head.