The era is Sengoku. Japan is split into numerous independent states locked in endless conflict. At the heart lies Ashina, a region of sacred soil and ancient secrets. Twenty years after Sword Saint Isshin Ashina seized control of the area through a violent coup, a fresh danger arises from within: The Interior Ministry. In a desperate bid to safeguard his homeland, Isshin's grandson Gen'ichirou resorts to forbidden powers. The sole hope rests with a kidnapped boy—the Divine Heir—and his mute guardian: a devoted shinobi known only as Sekiro. This is the tale of a lord and his retainer—and their mission to restore equilibrium to a nation on the brink.