During Prince Pompadore of Pumperdink's eighteenth birthday celebration, his birthday cake explodes, revealing a magic scroll, a magic mirror, and a doorknob. The scroll warns the prince that if the he doesn't wed a "proper princess" within seven days, his entire kingdom will disappear. The prince, along with the kingdom's wise elephant Kabumpo, set off on an adventure to the Emerald City so Pompa can marry Princess Ozma, the only "proper princess" the Elegant Elephant can think of as worthy of his prince. (Summary from Wikipedia)
"But I didn't " wailed Hashem, falling on his knees. "Only eggs, your Highness--very best eggs--sugar, flour, spice and -"
"Bombshells!" cried the King angrily.
"The cake disappeared before the party, your Majesty!" cried Eejabo.
Everyone jumped at the sudden interruption, and Eejabo, who had crept in unnoticed, stepped before the throne.
"Disappeared," continued Eejabo hoarsely, dripping blue water all over the royal rugs. "One minute there it was on the pantry table. Next minute- gone!" croaked Eejabo flinging up his hands and shrugging his shoulders.
"Then, before a fellow could turn around, it was back. 'Tweren't our fault if magic got mixed into it, and here we have been dipped for nothing!"
"Well, why didn't you say so before!" asked the King in exasperation.
"Fine chance I had to say anything!" sniffed Eejabo, wringing out his lace ruffles.
"eh-rr-you may have the day off, my good man," said Pompus, with an apologetic cough-- "