Rumors are circulating that the shogunate is losing control of some feudal domains. Lord Yagyu Munefuyu is assigned to deal with the problem and the rebellious clans will be crushed! Meanwhile, a former vassal of the Kazama clan is shot and killed. Moments later a second man is killed by a mysterious master swordsman. Matsudaira Choshichiro and his companions arrive at the crime scene and find a new type of repeating gun. The carved seal on the gun stock belong to the Saiga; a ninja clan abolished by the shogunate many years ago. The blame for the murders is placed on the Kazama clan. Are they guilty or is this a wise cunning plan by Lord Yagyu to be able to destroy the Kazama clan? Choshichiro sets out to reveal the truth and try to save the doomed Kazama clan! In his way are the Owari, Lord Yagyu and his ninja assassins, and the mysterious master swordsman! Will Choshichiro prevail against impossible odds...?

A shikakenin was an under-the-cover trade that undertook killing in Edo. Hanemon of Otowa, an agency that introduced laborers and maids, was also one of these. Katsugoro Iseya was a timber dealer who had come in as a client. His target was the constructions magistrate Hanno, and the Tatsumiya who sipped on the benefits. Hanemon who had a stong code towards killing, where he would only kill those who do no good to be in the world, accepts this request. Baian Fujieda, a needle doctor would carry out the killing. However, the professional killer Baian fails to bring down Tatsumiya. Hanemon then looks to another shikakenin, the ronin Sanai Nishimura for the role. Although Sanai's ability with the sword is good, he lives poorly in a tenement, and accepts this commission on the condition that it is kept a secret from his wife and child. Here, they close in on Hanno and Tatsumiya again...

Monjiro was born into a poor farm family in Mikazuki Village, Nitta County, Ueshu, and abandoned his hometown when he was 10 years old. He has been traveling aimlessly with a long toothpick in his mouth. Monjiro avoided getting involved in anything, but wherever he went, he ended up getting involved in incidents