After escaping the Emerald Palace and briefly leaving Oz, our heroes have returned to meet with Glinda, the Good Witch of the South. Yet Glinda says she cannot act against Queen Jinjur because the Scarecrow doesn't have any stronger claim to the throne. The true heir is the daughter of the land's last king, whom the Wizard of Oz hid many years ago. Believing Mombi might know something, Glinda takes her army to the Emerald City, with Tip and friends in tow, to confront the witch and force the truth out of her, if need be! But against Mombi's ability to change into any form she pleases, do our heroes have any hope of finding her?