The "Immortal Sugimoto" and the Ainu girl, Asirpa, were separated after a battle in Abashiri Prison. Asirpa, together with the "King of Jail Breakers" Yoshitake Shiraishi, was taken by Kiroranke and Hyakunosuke Ogata to Karafuto, the place where her father's footprints are still visible. Now that Nopperabo, who robbed the Ainu of their gold, is dead, only his daughter Asirpa can unlock the secret.
