In this thirteenth Oz adventure, young Kiki Aru of Hyup discovers the magic word Pyrzqxgl, which grants him the power to transform himself and others into any form he wishes. Corrupted by his newfound power, Kiki joins forces with the exiled Nome King Ruggedo, who plots to conquer Oz by turning its rulers and defenders into helpless beasts and trees. Meanwhile, Dorothy, the Wizard, Betsy Bobbin, and Trot roam the Winkie Country seeking birthday gifts for Princess Ozma, unknowingly venturing into danger. When the plotters transform their friends, the children must outwit the villains to restore peace and celebrate Ozma's joyous birthday.
