Rudolph Rassendyll has travelled to attend the coronation of his namesake and rumoured cousin, the new Ruritanian king.
On the eve of his coronation, the new king of Ruritania is poisoned by his bother and rival for the throne.
Posing as the king of Ruritania, Rudolf Rassendyll receives a warning from princess Flavia.
Madame Antoinette de Mauban tells Rudolf of the plot to murder the king.
Rudolf's attempts to seek out Michael are jeopardised by Rupert Hentzau's attack on him.
Rudolf comes under pressure to marry Princess Flavia.
Rudolf sets out to rescue the monarch and becomes aware of another plot involving Duke Michael.