Four years have passed since the First Stage of the Prophecy of the Light Horse was fulfilled through the miraculous birth of Soter, Son of the Great Horse. Now, Soter leaves His herd to begin His mission to break the Curse of Evil, freeing the cursed equines from enslavement to Abaddon the Dark Horse. Soter befriends seven young stallions and appoints them as His first followers, His apprentices. He then visits the many mustang herds in Great Plains, speaking words of wisdom and displaying miraculous powers of healing. But not everyone is convinced that Soter really is the Light Horse. As conflicts rise among the herds, Soter's friends are about to discover that there is more to the Prophecy of the Light Horse than they've even realized.