Count Von Teyn is a young officer in a cavalry regiment, and after a romantic courtship and marriage he unwittingly subscribes to a fund for the benefit of Miss Phoebe, a professional equestrienne. The latter thanks the Count by letter and asks that she be permitted to thank him in person. The letter falls into the hands of his wife, Lydia, and she witnesses the meeting and returns to her parents in a jealous rage. The Count later begs for forgiveness and a reconciliation follows. In a race for the King's cup, Count Von Teyn is one of the principal riders and Lydia, in company with her millionaire father, Peter Romford, and many other notables, occupy box seats in the grandstand. During the steeplechase, Count Von Teyn is thrown from his mount and injured. The family physician calls in consultation two eminent specialists and they agree that the young nobleman has suffered injuries which will cause him to be a cripple for life. Lydia bears this news with fortitude, and resolves to devote the remainder of her life to the care of her husband. The latter suffers intense agony and on one occasion attempts to gain possession of a revolver belonging to a brother officer, who is paying him a visit. Failing in this attempt to end his life, the Count implores his wife to furnish him with the means of self-destruction. As well as his helpless state will permit, he pictures the agonies which foe must suffer until death brings relief and Lydia finally succumbs to his pleading and furnishes the medium. It is now her turn to bear the unspeakable suffering which possesses her at the mere thought of her act. The authorities charge her with the murder of her husband and she is placed on trial. She pleads her innocence after a scathing denunciation at the hands of the public prosecutor. The summing up of the judges is prolonged, but in the end, Lydia is acquitted and leaves the courtroom surrounded by her parents and friends.