Princess Ozma is missing! When Dorothy awakens one morning to discover that the beloved ruler of the Land of Oz has disappeared, all of the Emerald City's most celebrated citizens join in the search for the lost princess.

But Ozma isn't all that's gone missing. The magical treasures of Oz have disappeared, too, including the Magic Picture, the Wizard's black bag, and even Glinda's Great Book of Records. With no clues to guide them, Ozma's friends separate into four search parties and spread out across their vast country in a desperate quest for their absent ruler.

Deep in the Winkle Country, Dorothy's search party is soon Joined by Cayke the Cookie Cook, who has lost a magic gold dishpan, and the amazing Frogman, a man-sized frog who walks on his hind legs. Together with these new allies, Ozma's friends learn that their valued possessions aren't missing but have been stolen by a mysterious villain. If their new foe is powerful enough to steal Princess Ozma and all of their magical treasures, how will they defeat him with no magic of their own?