An impulsive visit to Ruritania at coronation time makes a dramatic change in the carefree life of Rudolf Rassendyll, a wealthy and aristocratic young Englishman. 
The Rassendylls have a very unusual family relationship with the ruling house of Ruritania. With greatness suddenly thrust upon him, Rudolf must face an extraordinary and dangerous challenge. 

Rudolf Rassendyll has succeeded in 'standing-in' for King Rudolf at his coronation. Now a terrible discovery awaits him at the hunting lodge....