Year 1108 in the official calendar of the Pajan Empire, where great clans wage decades-long wars in attempts to seize power.

Okko the ronin heads a small group of demon hunters, wandering the realms of Empire. He is accompanied by Noburo, a mysterious giant who hides his face behind a red mask, and the whimsical monk Noshin, the sake lover with the power to summon and commune with the spirits of nature. When Tikku's sister Little Carp is kidnapped by pirates, the young fisherman enlists the group's help in finding her. But the quest will have a price...