Dr. Watson recounts an adventure that started on 20 March 1888. While the currently married Watson is paying Holmes a visit, a masked visitor arrives, introducing himself as Count Kramm, an agent for a wealthy client. Holmes quickly deduces that the visitor is in fact Wilhelm Gottsreich Sigismond von Ormstein, Grand Duke of Cassel-Felstein and the hereditary King of Bohemia. Realizing Holmes has seen through his guise, the King admits this and tears off his mask.
