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.

Aristocratic young Englishman Rudolf Rassendyll is both cousin and double to King Rudolf of Ruritania. When the King is drugged by his enemies just before the coronation, Rudolf is asked to take his place.

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

Rudolf has gone to keep a rendezvous with Antoinette de Mauban - even though Sapt is convinced it is a trap.

When Rudolf refuses Rupert of Hentzau's proposition - to betray his friends and keep the throne and Princess Flavia for himself - Rupert hurls a knife at him and escapes.

Rudolf has set off for Zenda castle with Colonel Sapt's small force, in a desperate attempt to rescue the King.