In the mystical city of Geo, two orphaned sisters—Giselle and Genevieve Villard—grow up in vastly different worlds. Genevieve follows the path of discipline and duty to become one of the revered Mystics, powerful wielders of magic who serve the ruling structure. Giselle, rebellious and carefree, rejects that life for one of parties and pleasure. But during the grand ceremony where her sister is to ascend in rank, an ancient and powerful magical force unexpectedly chooses Giselle as its new host. Suddenly thrust into a destiny she never wanted, Giselle must navigate treacherous political intrigue, deadly enemies, and powers she barely understands, as the balance of the magical world shifts around her.