The Fūma plan to revive the fortunes of the Hōjō family by winning the castle warden, Jindai Naiki to their side. They have observed the ambition of the junior minister who wants Kamijiro's position. The last of the ten Fūma, Yaheiji the Typhoon, tells the junior minister that government spies have been coming and going from Jindai's mansion. If he colludes with spies, he will have to commit harakiri. But if the matter is to remain secret, he must press Jindai to support the Fūma. Shintarō hears of the Fūma's plan, kills Yaheiji and rescues the chief minister, but Kotarō steals the rest of the map.
