Kevin is an Ancient, a being from before the human era who has to live in the present world pretending to be human, working for the crusaders, a military branch of wizards who hunt Mare, beings of the night whose origin in the world is unknown, and Jean is another Ancient who lost his memories due to the evil intentions of people he doesn't know, Although the two hate each other for being bullies at school, together they must reveal the mystery of their pasts and who they really are, even if the process is painful for them. But a mysterious sect will prevent them from achieving their objectives and perhaps... their search for the truth is only part of the plan of the leader of the villains.