Dorothy and the Witches of Oz.

Children's author Dorothy Gale makes a decent living continuing her grandfather's series of Oz books. When a new agent enters the scene, Dorothy moves to New York city. In the midst of a major business deal for her books, Dorothy discovers that her books are not based on her imagination, but on repressed memories. While Dorothy struggles with the revelation, she is forced to confront The Wicked Witch of the West, who has descended upon the Big Apple, determined to settle an old score.