The year 2024 AD—Keio 160, Edo. Japan, still under Tokugawa rule and closed off from the world, was dominated by twelve families possessing extraordinary powers— The only means to change the world was the “Gudoku”—a battle to the death among representatives of the twelve houses. Ham, a young man living in this oppressed society, becomes entangled in the “Gudoku” after meeting a certain girl...!? The battle royale among the gifted begins, as they vie for supremacy over the next Japan!!