Kyoshiro and Kyo: Two spirits in one body. Yuya is looking for a "man with a wound on his back" who killed her older brother. The two head to Edo together. One after another, samurai come after Onime-no-Kyo. Why do Kyoshiro and Kyo share the same body? Historical figures, such as Tokugawa Ieyasu and Oda Nobunaga, emerge in the story and the mystery of the two souls is gradually resolved.