When he wields a sword, he transforms into an unrivaled weapon-wielding creature. In the Edo era, whispers of a creature dubbed "Mononote" rampaging through the Nakasendou Route spread like wildfire. Okota, a wandering woman, crosses paths with Hitatsura, a boy whose hands are unbelievably turned around. Experience the unparalleled world of Edo-era ninja as they carry out their humbling duties during times of peace.