An incriminating love-letter from the Queen of Ruritania to Rudolph Rassendyll, the hero of The Prisoner of Zenda, is intercepted by the dastardly villain Rupert of Hentzau, who is intent on causing trouble for the Royal Family. Rassendyll is forced to return to save the day and again assume his impersonation of King Rudolph. Once more he is embroiled in a world of deception, intrigue, deadly swordfights and strained loyalties, but will he be able to restore peace to Ruritania a second time?