During the Meiji Restoration, enemies and friends fought bravely for their respective ideals and goals. During this period, famous people emerged: Okubo Toshimichi, Kido Takayoshi, Sakamoto Ryoma, Okita Souji. In order to promote the arrival of a new era, the reformists did not hesitate to resort to assassination, and Kenshin Himura was one of the many assassins. Born as an orphan, Himura learned the Hiten Yuken-ryu swordsmanship from Hiko Seijuro, and went down the mountain to participate in the war with youthful vigor, and emerged in the Qibingtai. With his skills, Himura eventually became the executioner Battousai, who was feared by the shogunate faction. At the same time, he also had countless duels with his old enemy Mibu Wolf Saitoichi. After the establishment of the Meiji government, Himura put away his butcher knife and became a ronin with a reverse blade on his waist. During his wandering, he met Kaoru, the heir of Kamiya Dojo, Myojin Yahiko, a descendant of the Tokyo Prefecture samurai, and Sagara Sanosuke, a former member of the Akahōtai. In battle after battle, their friendship deepened, and Himura's blood-stained heart was slowly purified... This film is adapted from the comic of the same name.