James David Williams has always led a rather normal highschool life. Until one drunken night when he was almost killed by a group of monsters and saved by the transfer student from Europe and her friends. Soon he's wielding the same abilities they do, embroiled in a secret war while trying to juggle his normal life with the burden that came with being a Chevallier. As he finds himself fighting ever desperate battles, a lone figure appears to ask him a simple question: "Will you quietly withdraw, or die trying to fight us?"