L. Frank Baum

Dorothy, back in Kansas, can't stop thinking about Oz. She 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. Dorothy escapes from the mental hospital. When she awakes, she and a chicken named Billina find themselves in Oz. Dorothy tries to find her old friends in the Emerald City, but learns that they have all been transformed by the Nome King....