Prospera, the Duchess of Milan, lives in exile on a desert island after being thrown out of power by her wicked sister. For company, she has only her daughter Miranda, the spirits of the island, and her beloved books. The books are the source of her magic, which she uses to lure her enemies to the island so she can exact revenge. But her plot could destroy Miranda’s happiness, so Prospera must choose between her own anger and her daughter’s future.