Izumi, a female commander of the long-established inn "Shirakawa Ryokan" in a local hot spring town, was imprisoned underground and trained by his nephews because he confronted with the Shinzan group of emerging powers. The situation of the spring that was betrayed by Yasuko, the chui-to (the head of a group) at Shirakawa Ryokan and Shinjo, the bangashira who trusted him...