Long ago, the land of Equus was once perfect and good. But Abaddon, the evil Dark Horse, tricked the equines into rejecting their loyalty to their Creator, the Great Horse. As a result, a curse fell upon the equines, dooming them to eternal enslavement. But there is still hope. Two young mustangs name Sierra and Shadow have been chosen by The Great Horse to raise His Son, the Light Horse, who is destined to break the Curse of Evil and rule as the eternal King of equines. However, Abaddon will stop at nothing to prevent the birth of his opponent. If the Prophecy of the Light Horse is ever to be fulfilled, Sierra and Shadow must chose: give in to fear, or trust in the Divine Ones and their plans.