True magic. In a world with mana and spells, is is still just a myth. Magic that does not requires mana. Magic that is not bound by any set of rules. Yet, it have been achieved, and militarized. Unit 013 (Ëdel 013) is an experimental military unit whose role is to test out whether the Umbrius stone, the first harnessable source of true magic, is effective on the battlefield.