Saichi and Asirpa head to Otaru, the largest town in the area, in seach of the tattooed prisoners. They quickly find out that they're not the only ones after the treasure. The army is looking for it too. Saichi has to face off against a deadly sniper, and a horrible cold front is setting in too.

Sugimoto visits an Ainu village where he learns about their ways and culture. The next day he leaves in secret, where he is captured by the 7th and tortured.