24 April 2024 – In the noble, vast land of Hokkaido in the north of Japan, in the tumultous early 20th century...

Saichi Sugimoto is a Russo-Japanese War hero who earned the epithet "immortal" for the otherworldy combat skills he demonstrated on many battlefields, including the bloodiest of them all: 203 Meter Hill. Hoping to find a huge sum of money for a certain purpose, he begins searching for gold in Hokkaido.

There, Sugimoto learns about a large trove of gold that was stolen from an Ainu tribe. The man who stole it, Noppera-Bo, hid it just before being captured. He gave 24 of his fellow inmates tattoos that, when combined, make up a single code that reveals the location of the gold, and then helped the prisoners escape.

Around that time, Sugimoto is attacked by a wild brown bear and saved by an Ainu girl named Asirpa, whose father was killed by the man who stole the gold. Sugimoto, who wants to find the gold, and Asirpa, who seeks revenge for her father, decide to team up.

Another man is also on the treasure's trail: Tokushiro Tsurumi, First Lieutenant of the 7th Division of the Imperial Japanese Army. He schemes to conquer Hokkaido for the sake of his soldiers who risked their lives in the war but were left unrewarded, and needs the gold to fund his military aims.

Among the escaped prisoners is Toshizo Hijikata, the merciless vice-commander of the Shinsengumi military police force who was thought to have died in the Boshin War. He and his former ally Shinpachi Nagakura seek the gold to realize their own ambitions.

Sugimoto & Asirpa, the 7th Division, and Toshizo Hijikata all go head-to-head in a bid to strike it rich in the majestic northern wilderness! The three-way battle for survival begins now!