The Land of Oz festers with social unrest. The Emerald City plans to invade Munchkinland, Glinda is under house arrest, the Cowardly Lion is on the run from the law, and Dorothy is knocking on the door. It is time for Elphaba's granddaughter Rain, now come of age, to take up her broom and her legacy in an Oz wracked by war. Fourth, and final, in the Wicked Years saga.