During another twister, Dorothy is hit on the head by a gate and once again whisked away to the Land of Oz. But this time, on her way to the Emerald City, she discovers the witch Mombis terrible plot to conquer Oz with an army of monster green elephants thats shes brewing up. She escapes with the help of Mombis slave Pumpkinhead, and they try to warn King Scarecrow and her other friends that Mombi is coming, but she finds that they havent quite changed as much as she thought. So its up to her, Pumpkinhead, and the living carousel horse Woodenhead to find a way to stop Mombis green elephants.