O'Rourke, who is sketching on the borders of Grandlieu, gets a message by carrier pigeon from Beatrix, who tells of her forthcoming marriage to the Duke Victor, and asks him to help her. With his valet, Danny, he starts for the capitol. In the meantime the Duke has been making love to Beatrix and tells her that he believes she is still in love with the adventurer. The ministers come on and tell them that the date for their wedding will be announced that afternoon before the populace in the chamber of state. Captain de Bressac comes to the Duke and tells him that O'Rourke is to arrive at the inn. Together they go to the inn and meet Karen, an Indian Princess, who is in search of the Pool of Flame, a jewel stolen from a temple. It is plain that the Duke is well acquainted with her, for she shows him the message. He tells her that he believes it is in the possession of O'Rourke and outlines a plan to get it. She agrees to the plan. O'Rourke arrives at the inn and meets Chambret, an old friend. He leaves the latter in the inn office and goes upstairs to his room to change his clothes to get ready for his visit to the Princess. As he is on the stairs Karen purposely stumbles into his arms, thus making his acquaintance. O'Rourke, with Danny, enters his room to change. In the meantime Chambret is kidnapped on De Bressac's orders and is placed in an outbuilding. When O'Rourke returns De Bressac tells him that he is to conduct him to the Princess. O'Rourke leaves with him. He is taken to the Duke's castle. In the meantime Beatrix has despaired of his coming and is ready in her robes to go to the chamber of state with the Duke, to have the marriage date set. The Duke tells her that if she will come with him he will convince her for all time that O'Rourke is unworthy of her and is at the very moment in the company of the Indian Princess, his mistress. She consents and they go to the Duke's castle. O'Rourke is show into the room and finds Karen waiting. She throws herself into his arms. At that moment the Duke raises a panel in the wall and Beatrix sees the affair and believes the Duke's tale. The panel drops before O'Rourke can interfere. He and De Bressac draw their swords and fight back into the secret passage. In the meantime Danny, who is following around a pretty chambermaid, finds Chambret in the shed and at once they start for the castle, commandeering an auto that Danny drives. Back at the fight De Bressac tries to kill O'Rourke, but the latter, by accident, springs the trap and De Bressac falls and is killed. O'Rourke sees his body on the rocks below. He hurries out and finds Beatrix and the Duke just leaving. He pleads with her, but she refuses to forgive him. At this moment Chambret comes on and confronts the Duke. He explains to Beatrix and drops on his knees to ask her to take O'Rourke back. She is convinced and tells him to come, that she will go where the ministers are waiting. She takes him to the chamber and starts to introduce him, but he stops her and tells her not yet, not until he has made himself her equal in every way will he consent to their marriage. This closes the story.