Seriously wounded and projected in a distant country, Asta re- becomes aware of Hi-no-kuni, the native country of Yami. There, Ryûya, the shogun, offers to help him acquire a local technique capable of defeating the fearsome Lucius. Asta then strives to learn the Zetten which should allow him to win the victory. But with his trainer, he makes amazing discoveries about the past of his captain...