The Duke de Longtour, a European nobleman, with impoverished estates, comes to America and wins the hand of Stephana Martin, an American heiress, defeating Marquis Ferdinand, an adventurer and his rival. He leaves a sting in the breast of Countess Maria, who loves him. The young nobleman brings his wife to Europe. The Countess and the Marquis, driven by a common interest, plot to estrange the young couple so that the Marquis can marry the heiress and Countess Maria can have the Duke. They hire an adventuress, and the Marquis, posing as a friend, brings Stephana to a cabaret just in time to see the adventuress throw her arms about the Duke. Stephana at once believes the worst and arranges to leave the Duke. But the Duke has befriended the adventuress and she confesses all. The plotters are denounced and the husband and wife reunited.