A tattoo is an ancient weapon that enhances the physical ability of it's user, known as a Sealed, allowing him to bring forth supernatural phenomena when activated by his own unique trigger. When Justice Akatsuka-a.k.a. Seigi-saves a man from some street punks, the man gives him a strange stone as a token of gratitude. The moment Seigi accepts it, a mysterious tattoo appears on his palm. And so the battle begins, framed by a web of conspiracies and centering around Justice Akatsuka-the boy who obtained a tattoo by complete chance.