In the early twentieth century, Russo-Japanese War veteran Saichi Sugimoto searches the wilderness of Hokkaido for a hoard of hidden gold. With only a cryptic map and a native Ainu girl to help him, Saichi must also deal with every murderous cutthroat, bandit and rogue who knows about the treasure!

Lieutenant Tsurumi's men begin their all-out assault on the Goryokaku Fortress under the cover of naval bombardment. Hijikata still has some tricks up his sleeve and an old cannon provides needed support. But now, getting Asirpa and the deed for the Ainu land out of the fortress and to safety is the goal. In this battle, scores will be settled and old enemies will come face-to-face. Although often at odds, Hijikata and Sugimoto will find themselves fighting together, each with their own understanding of the meaning of Bushido...