On Devil's Head Island, in the Seto Inland Sea, there is a legend of refugees from the Heike Clan. Gempaku, who wants to see his descendant, Motomaro, continue the family line, has tried all manner of methods, using the Forest of Disappearances as a cover, but Motomaro keeps stuffing and mounting the women Gempaku brings him. With treasure seeking Fujiko and Lupin, and Zenigata and Goroohachi, the patrol officer stationed on the island, who are in hot pursuit, getting all mixed in, the battle with the samurai army is a seesaw. Is there no escape from the heavy siege?