A boy's family is wiped out in an Indian massacre of a wagon train and he is captured. He befriends a wild colt. Years later, following his escape, he is recaptured by Indians who force him to fight their vicious devil horse . The horse looks somewhat familiar.
Unattractive and poor Polly Gordon, is taken to the college dance by eligible Vincent DePuyster only as part of a fraternity initiation. Suitors flock to her, however, when she inherits half a million dollars from her aunt, but she grows cynical and dismisses them.
When a revolution breaks out in a small European monarchy, the king sends his crown jewels to an American banker, Maxwell Grey, to keep them out of danger. However, Madame Levine, the head of an international jewel theft ring, finds out and plans to steal the jewels. She poses as a wealthy society matron and befriends Grey. Young French refugee Diana De Lille, who at first was taken in by Madame Levine, begins to suspect that the woman is not who she says she is, and confides her suspicions to Kenneth Grey, the banker's son, who has fallen in love with her.
A friend of Dick Bailey is killed by a mysterious assailant, whom Dick suspects to be Stack, who is in league with the crooked sheriff. Out on a spree Dick swears he will marry the first woman he sees, who happens to be Ruth Hammond, sister of his dead friend, arriving to take charge of the Hammond ranch. Revolted by his rough proposal,she fires him as the Hammond foreman and she proceeds to the ranch. Stack informs her he has purchased the ranch for the payment of the back-due taxes, and she relents and rehires Dick and his friends to aid her in her fight against Stack.
During World War I, Jane Whiting, a bright young lawyer who is engaged to Senator Wheeler, is assigned by the district attorney to expose a gang of spies who are collecting money for the German government through the operation of a fraudulent charity organization. Wheeler's son Frank has fallen in love with Lola Schram, whose pro-German mother is forcing the girl to work for Frederick Kube, the head of the spy ring, but when Kube learns of the romance, he orders Mrs. Schram to break it off. When Lola finally confesses her activities to Frank, Kube kills her and then frames Frank for the murder. Meanwhile, Jane, through the help of Jimmy and Tilly Ware, has discovered Kube's headquarters and modus operandi
Slippery Slim and his wife, Sophie, drive to town. While Sophie does her shopping Slim sneaks over to the saloon to get a few drinks. Here he meets Mustang, so the two drink together. Slim has promised his wife that he will not take a drink as long as he wears a certain ring on his finger, so takes off the ring before each drink.
Slippery Slim and Sophie are deeply in love. Slim incurs the enmity of Hiram Clutts, Sophie's father, and Mustang Pete. They swear vengeance. Mustang writes a note to Slim, signing Sophie's name, asking him to meet her in a cemetery. Slim finds a band of men waiting clad in sheets. He flees and asks Sophie to save him.