<p>When three princes and a princess meet at a wedding in Vienna, their topic of conversation is a fourth, absent princess. She is Princess Petra of Prague, reputedly beautiful beyond compare and daughter of Bad King Wenceslas, he being the son of the late Good King Wenceslas, but where is she and why didn't she show up? Convinced some dastardly deed has prevented her attendance, they take the bold step of going in search of her. None could have ...