Vowing vengeance on Edward Marriott, whom he believes to have dishonored his mother, The Shadow is a highwayman who robs only Marriott. The Shadow attracts the interest of Dorothy Harden, Marriott's fiancee, and finally he captures her. The action includes the kidnapping, by The Shadow's rival, Ben, of Dorothy; The Shadow's capture and escape; and his rescue of Dorothy. All is happily resolved when Dorothy declares her love for The Shadow and Marriott proves to be innocent of injuring The Shadow's mother.