In mid-19th century Edo period, a masterless rōnin named Mokunoshin Tsuzuki resides in a peaceful village among those he helps. However, as the prevalent peace and tranquility are sure to be replaced by war and conflict across the land, the swordsman feels restlessness creeping upon him.
Ryunosuke, a gifted swordsman plying his trade during the turbulent final days of Shogunate rule, has no moral code and kills without remorse. It’s a way of life that leads to madness.
Japan, 1860. The men of the Mito clan, victims of the Ansei purge, anxiously prowl around the Sakurada Gate of Edo Castle with the intention of assassinating Naosuke Ii of Hikone, tairō of the Tokugawa shogunate and responsible for their misfortune.
Kenshin has settled into his new life with Kaoru and his other friends when he is approached with a request from the Meiji government. Makoto Shishio, a former assassin like Kenshin, was betrayed, set on fire and left for dead. He survived, and is now in Kyoto, plotting with his gathered warriors to overthrow the new government. Against Kaoru's wishes, Kenshin reluctantly agrees to go to Kyoto and help keep his country from falling back into civil war.
Kakunoshin, renowned for his skills with a sword and in the game of go, embodies the samurai code. Falsely accused of a theft, he is forced to become a lowly ronin. Years later, when a case of missing gold pulls him into a new web of intrigue, Kakunoshin uncovers the truth behind his downfall. With the real culprit exposed, the go board flips, and a hellstorm of righteous vengeance follows.