All of Witch World knows to fear the hated, fire-eyed Keplian horses who lure riders to their deaths. All that is, save for one young Native American girl new to Witch World, who rescues a Keplian mare and her foal and discovers an awesome truth—the Keplians were created to serve light, not darkness, and to ride with humans. This is the first in a new trilogy.

The witches summon the mighty to Es: Lord Tregarth and his wife, Jaelithe; War Marshal Koris and Lady Loyse of Gorm; the famed adept Hilarion and sorceress Kaththea Tregarth; Dahaun of Green Valley; and many others of power. Allies and former enemies face a crisis greater than the Turning, a treat worse than the Kolder, and apocalypse beyond the Great Disaster.