Dorothy and her canine pal Toto live a quiet life on a Kansas farm with Uncle Henry and Aunt Em. But one day, the little girl and her dog find themselves spirited away from the fields of Kansas, to the magical land of Oz! Dorothy and Toto meet many friends on the yellow-brick road to Emerald City, where she hopes to find a way home to Kansas-- but when she arrives, the city’s mysterious ruler, the Wizard of Oz, is not what she expects! The Wizard can help Dorothy get home, but at a daunting price: she and her friends the Tin Woodsman, the Scarecrow, and the Cowardly Lion must kill the Wicked Witch of the West and free the Winkies from her rule. (Source: Discotek Media)

Oz no Mahoutsukai is based on the first three and the sixth books in the Oz series by L. Frank Baum. Due to the latter two books not having been in public domain at the time, the series had to take large liberties with the plot.