Kai is tormented by an indescribable feeling of longing from the strange dreams that plague his mind. The dreams reveal a land far away, a precious memory that he cannot identify yet cannot let go of. An encounter with Ellia, a girl that wields magical powers, stirs the dormant memories in Kai. In a misfit of events, they form a contract, Kai becomes a familiar and joins a cryptic organisation that defeats demonic creatures created by dark magic.