When a letter from Dr. Hans reveals the story of the miraculous medicine, Yutaro joins the Peace Force in an effort to find it.

As Aoshi arrives to bring her home, Misao joins Kaoru and some friends for a final shopping spree. However, Sanosuke and Yahiko's efforts to keep an eye on the women lead to them to be mistaken for a pair of thieves.

The Water family's efforts to gain control of the Ki have left Kaoru seriously wounded.