Based on L. Frank Baum's turn-of-the-century children's book, "The Wonderful Wizard of Oz," Fleming's film tells the tale of Dorothy Gale (Judy Garland), a young girl swept away by a tornado and deposited in the mysterious land of Oz, an enchanting kingdom ruled by an all-powerful wizard (Frank Morgan) and besieged by two evil witches. When Dorothy's tumbling house kills the Wicked Witch of the East, her sister -- the cruel Wicked Witch of the West (Margaret Hamilton) -- swears to exact revenge. But the young girl has other things to worry about. Namely getting home, a quest that requires her to travel across Oz, enter the fabled Emerald City, and seek help from the Wizard himself. Fortunately, Dorothy befriends a trio of bumbling warriors along the way: a Scarecrow (Ray Bolger) who doesn't have a brain, a Tin Man (Jack Haley) who was never given a heart, and a Cowardly Lion (Bert Lahr) who lacks courage.