Rurouni Kenshin, Vol. 13 continues where the previous tankōbon left off and contains the next nine chapters (103–111) of the on-going manga series.
While Saitō Hajime makes the arrangements for the fight against Shishio Makoto, Himura Kenshin and Sagara Sanosuke returns to the Aoi-Ya, where they find Kamiya Kaoru and Myōjin Yahiko. Okina wants Kenshin to end Shinomori Aoshi's life, but Kenshin believes there is still a chance to save him and promises Makimachi Misao that he will bring him back.
The next morning, Saitō picks up Kenshin and Sanosuke and they leave for Shishio's base. Unknown to them, Sadojima Hōji has sent most of the Juppongatana to attack the Aoi-Ya to prevent any further interference from the Oniwabanshū. Guided by Shishio's lover, Komagata Yumi, Kenshin and his friends find the first Juppongatana, the fallen monk Yūkyūzan Anji.
Sanosuke is shocked to find Anji there and volunteers to fight him to learn if he is really evil. During the course of a brutal fight, Anji tells Sano his history and why he joined Shishio. He wants to save the world, but Sanosuke convinces him that his wish to destroy is not the way to achieve his goal. Although Sano is injured, he defeats Anji, who then warns them that the Aoi-Ya is under attack.
Kenshin had asked Hiko Seijūrō to go there to protect Kaoru and the others, and he decides to trust his master to defend the Aoi-Ya. Kenshin then asks Yumi to guide them to the next fighter.
This tankōbon is written and illustrated by Nobuhiro Watsuki. The Kyoto arc continues as Himura Kenshin accepts the challenge of Shisho Makoto. Sagara Sanosuke fights Yūkyūzan Anji and eventually wins, but not without any injury. Meanwhile, a sneak attack was issued to the Aoi-Ya, where Kenshi sends his master, Hiko Seijūrō, to help defend as he continues forward towards Shisho Makoto.
All in all, Rurouni Kenshin, Vol. 13 is a wonderful continuation to a series that seems really intriguing and I can't wait to read more.