Soter the Light Horse has finally broken the Curse of Evil and now rules as the all-powerful King of Equus. But the war between good and evil is far from over. Even in his weakened state, Abaddon the Dark Horse will use all of his power to seek his revenge by destroying the equines.
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​Meanwhile on Equus, Stone, Lightning, and the rest of Soter's faithful band of apprentices begin their own mission to recruit equines around the world to join Soter's Herd. But such a task is not going to be easy, for there are still enemies seeking to stomp out Soter's memory forever. Among them is Wolf, King Wildfire's ruthless deputy, who carries out orders in hunting down Stone and his friends. But the Light Horse has different plans.