With two map pieces secured, Sugimoto and Asirpa continue their hunt for the remaining 22 tattooed convicts whose bodies hold the key to hidden treasure.

On the Hokkaido frontier, a war veteran and Ainu girl race against misfits and military renegades to find treasure mapped out on tattooed outlaws.

Ai has had a crush forever on her classmate Tatoe. When she finds out that Tatoe is in a secret relationship with another girl, she sets out to sabotage their plans for the future.