In the era when samurai controlled Japan... The Masked Demons annihilated all but one member of the Shinsengumi, who had worked to maintain the peace and public order in Kyoto. Seven criminals are chosen as substitutes for the deceased Shinsengumi members, and they are led by Ichibanboshi, whose parents were also killed by the Masked Demons. He becomes a substitute for Commander Isami Kondo and goes after the Masked Demons with the other substitutes to avenge his parents' deaths. Former criminals rise up to restore peace and order as their crazy story begins! Now is the time to shine the brightest!
The story takes place in the mighty Northern field of Hokkaido, the time is in the turbulent late Meiji Era. A post war soldier Sugimoto, aka, “Immortal Sugimoto” was in need of large sums of money for a particular purpose…. What awaited Sugimoto, who stepped into Hokkaido’s Gold Rush with dreams of making a fortune, was a tattoo map leading to a hidden treasure based on hints inscribed on the bodies of convicts in Abashiri Prison?! The magnificent nature of Hokkaido vs vicious convicts and the meeting with a pure Ainu girl, Ashiripa!! A survival battle for a hidden treasure hunt begins!