Dorothy and the Wizard in Oz

Dorothy Gale, accompanied by her cat, Eureka, is traveling to visit her Uncle Henry and her other relatives in California, when she encounters her second cousin, Zeb. While en route in a horse-drawn buggy, an earthquake strikes, creating a vast crevasse into which Dorothy, Zeb, Eureka, and a cab-horse named Jim fall. While underground, they encounter the Wizard, who was last seen flying off in a balloon at the end of The Wonderful Wizard of Oz.