 Dorothy, back in Kansas, can t stop thinking about Oz, and even believes that her friends have sent her a key. Auntie Em, worried for Dorothy s health, takes her to a famous doctor who works miracles with electricity. When Dorothy escapes from the treatment, she and a chicken named Billina find themselves in Oz. But when Dorothy tries to find her old friends in the Emerald City, she learns that they ve all been transformed by the Nome King. And the evil witch Mombie wants Dorothy s head. It s up to Dorothy, Billina, and their new friends, the clockwork Tik-Tok (aka the royal army of Oz), Jack Pumpkinhead, and a Gump-thing to defeat Mombie and the Nome King and restore the rightful ruler of Oz to her throne.