While searching for a way to identify the fake skins, Hijikata's and Sugimoto's groups must unite to fend off a surprise attack from the 7th Division.

Sugimoto's group arrives at an Ainu kotan, but Asirpa senses that something is off. Ogata attempts to test the authenticity of the villagers.

As Tanigaki, Inkarmat and Cikapasi continue their journey, Sugimoto and Hijikata devise a plan to rescue Shiraishi from the 7th Division garrison.