Helena Richie leaves her drunken husband, who had killed their child, and goes to Old Chester in Pennsylvania with her friend Lloyd Pryor. Helena adopts a homeless boy, David, who had been a ward of the town's minister, Dr. Lavendar. Helena's true husband dies, but Lloyd Pryor, now tired of Helena, refuses to marry her. Helena confesses to the minister about her actual relationship with Pryor, and Dr. Lavendar forces her to give up her son. Helena agrees, certain that she is an unfit mother. Helena pleads her case and fights for her maternal rights.

Marie Grandon may have seen more of the world than any nice girl ever would, but her motives remain pure. Marie labors in a New England oyster cannery and dreams of someday crushing the slumlords who prey upon the poor. While on a cruise, "Iron" Lloyd, a millionaire financier and tenement owner, decides to visit the town where Marie lives. Under the name Strange, he gets in a fight and is injured. While recuperating, he meets Marie and she tells him of her dream. Lloyd is intrigued by this and decides to test her. He has his lawyer transfer a huge sum of money to her and makes it look like she inherited it from a distant relative. Marie takes the money, goes to New York, and does exactly what she had planned. Her main target happens to be Lloyd. His business rival, Ogden Deneau, even aligns with her, pretending interest in her cause, but really wanting to ruin Lloyd. Marie, however, had dealings with Deneau a long time ago and plans to crush him too.

When composer Anselm Kardos leaves his alcoholic wife, he gives his daughter Lily an unfinished love ode entitled "The Song of Songs" and warns her to keep her artistic temperament in check.

Cyril Hamilton is a chicken-hearted easterner who heads west. He makes up for his past misdeeds by rescuing a Cavalry colonel's daughter Marcia West from Mexican bandidos.

Richard Duvall is a young American detective in the employ of the French Secret Police. While in Paris he meets Grace Ellicot, also an American, with whom he falls in love. He marries her and is about to start on his honeymoon when he is called on by Mons. Lefevre, chief of the secret police. The French Ambassador to England, Monsieur De Grissac, has lost an ivory snuff box which must be found.

While developing a powerful explosive, naval officer Paul Towne introduces his friend Richard Tracy to Judith Corbin, his friend since childhood. For years, Paul had assumed that he would marry Judith, but when Richard proposes, Judith, tired of waiting for Paul, accepts. Soon after the marriage, Richard becomes more interested in the new explosive than in his new wife, and to pay off gambling debts, he agrees to steal the formula and sell it to a foreign government.

When Bob Stokes, a wealthy New York clubman, loses his fortune, he is jilted by his fiancée Marcia Fontaine. He then wanders to an upstate lumber camp where he impresses the owner, Henry Willard, with his leadership and fighting abilities. After Stokes quells a strike engineered by the previous foreman, Robert Brummon, who is really a Bolshevik agitator, to prevent shipments of lumber for government contracts, Brummon, seeking revenge, sets the forest on fire, but Stokes controls it. Willard then sends for Stokes to oversee his New York shipyards where a government "mystery ship" is under construction. After Stokes and Willard's daughter Helen fall in love, Brummon gets Marcia to attempt to seduce Stokes. Marcia lures Stokes to her apartment, where Brummon plans to kill him, but he escapes when he learns that a time bomb is set to destroy the ship.

John Kendall was brought up in a wealthy family, but when his father loses the family fortune and then dies, John is left penniless. He joins the army and rises to the rank of sergeant. He soon meets and falls in love with Edith Ferris, the daughter of Col. Dickinson. When he talks to her at a party, Lt. Burkett upbraids him for fraternizing with an officer's family. Edith's mother, not wanting her daughter getting involved with a lowly enlisted man, conspires with Lt. Burkett to discredit John.

After robbing a bank, a criminal is wrongfully pardoned from prison.

Revolutionary War heroine Betsy Ross finds herself in competition with her sister for the affections of a British soldier.