Alcina, a powerful sorceress dwelling on a remote island, enchants all who arrive at her shores, transforming them into animals, rocks, or servants to maintain her dominion. When the knight Ruggiero lands with his companion Bradamante—who disguises herself as a man named Ricciardo—Alcina becomes infatuated with Ruggiero and uses her magic to bind him to her will. Bradamante, desperate to reclaim her beloved, must navigate the treacherous court of illusions and deception while concealing her true identity. As Alcina's power begins to wane and her former lovers are restored to human form, the sorceress's grip on Ruggiero weakens. Through courage and cunning, Bradamante ultimately breaks the enchantment, freeing Ruggiero from Alcina's spell and restoring the island to its natural state. The opera explores themes of love's transformative power, the conflict between magic and reason, and the triumph of genuine affection over supernatural manipulation.