Plot: During the reign of the 8th Shogun Tokugawa Yoshimune, Mondonosuke, a young retired Jikisan-Hatamoto learns from Yoshimune who saved him from a crisis on his samurai training trip about the assassination of Iwashiro Yasutaka, the lord of the Kameda domain. Mondonosuke realizes that Omine-no-Zenki who was his apprentice brother is responsible for the assassination