Equinora, the world where horses live in harmony with people, is in trouble. The six unicorn guardians created by the Goddess have abandoned their roles and vicious bloodwolves rampage across the land, massacring the herds and villagers. Fleet, a young stallion without a territory, dreams of galloping with other horses and building a herd of his own. But an attack by a bloodwolf leaves him poisoned and alone. Driven by despair and a promise to fulfil his dying dam's vision, Fleet sets out to discover how to vanquish the bloodwolves. The only help the renegade unicorns provide is to insist Fleet follow a prophecy to confront the villainous Shadow, an equine so powerful that the Goddess imprisoned him to prevent him destroying her realm. Accompanied by Yuma, a young man desperate to escape his destiny, and Tatuk, a tiny dragon, Fleet seeks Shadow and a cure for the bloodwolf poison. But even as he begins to fear the selfish unicorns have sent him to his death, he discovers a secret that might mean he has a chance to save all horses and people from annihilation.