Lute and his friends Cheval, Lilia, and Navirou live in Hakum Village, where chosen children learn to be Riders. Riders form a bond with friendly monsters called Monsties hatched from eggs, riding them as mounts for travel and combat. Due to monster riding being a taboo skill in a society filled with monster hunters, Hakum Village is isolated from the outside world and keeps its riding tradition a secret to all but a few privileged individuals. As Lute adventures with his friends and learns more about monster riding, a past threat remerges called the Dark Blight, infecting the nearby forest and leading to more aggressive monster attacks. A new generation of riders now has to find a way to stop the blighted monsters without having to destroy them outright.