Kathleen O'Moore returns to her home in rural Ireland and becomes torn between the affections of Michael Rooney, a poor but honest man, and the wealthy squire with the power to make her dreams come true.

A penniless Irishman becomes the business partner of an English aristocrat with a penchant for high-stakes gambling.

A King’s Messenger has important documents stolen by a female spy. The plot follows the messenger’s uncle as he takes action to track down the culprit, retrieve the papers, and unmask the spy.