Having lost all his funds betting on the races in London, John Peters contemplates suicide; then, overhearing the conversation of two men, he considers a new course of action. He stuns one of them--Kluck--and after changing clothes with him, he makes his way to the United States, where he wins at the races, speculates successfully on Wall Street, and amasses a fortune under the sobriquet "Lucky" Carson. Kluck arrives in America, makes Carson's acquaintance, and begs for his help, which is freely given. Carson manages to retrieve some incriminating correspondence between Kluck and an adventuress, Madame Marinoff, who is threatening him. Kluck accuses him of a conspiracy, and a quarrel ensues when Carson reveals his true identity; but Doris Bancroft, Kluck's sister-in-law, discovers that he is innocent.