The film is the biography of Frank Baum, the children's book author and creator of the fantasy world Oz.
L. Frank Baum
Maud Gage Baum
Dorothy Gage / Dorothy Gale
Matilda Joslyn Gage
Al Badham / Cowardly Lion
W.W. Denslow
Harriet Baum Neal
Helen
Charlie
Ned / Farmer