"We must leave for Zenda immediately to find the King!" cried Sapt. "If we are caught, we will all be killed!" So Rudolf Rassendyll and Sapt galloped through the night to find the King of Ruritania. But the King was now a prisoner in the Castle of Zenda. Who would save him from his enemies, the dangerous Duke Michael and Rupert of Hentzau? And who would win the heart of the beautiful Princess Flavia?