Dorothy and her Uncle Henry and Aunt Em live on a farm in Kansas at the beginning of the story. Dorothy, her house, and her dog Toto are all swept away to the Land of Oz when a cyclone strikes the farm one day.
Dorothy has a number of traveling companions. The first one is a scarecrow who wants a brain, the second one is a tin woodman who wants a heart, and the third one is a cowardly lion who wants courage. All three of them want to be human.
On their journey to the Emerald City together, they encounter numerous challenges, including attacks from flying monkeys and a lethal poppy field.
They are given an opportunity to speak with the Wizard of Oz when they finally reach the Emerald City. However, when it becomes clear that the wizard is deceitful, he is unable to assist them. Instead, he sends them on a mission to eliminate the Wicked Witch of the West, who is in charge of Oz's western region.
The group embarks on their perilous mission and encounters numerous obstacles along the way. They return to the Emerald City to claim their rewards from the Wizard after eventually killing the witch.