In a desperate crisis, Inamaru is plunged into the dark sea by a strike from Tokugawa Ieyasu. Ryutaro desperately tries to rescue Inamaru. However, it's not just Ieyasu who aims for him and the precious treasure of the Unshaken Banner. Various individuals, good and evil alike, are aiming for the foothills of Mount Fuji where the hidden treasure lies.

Ce synopsis est en anglais : nous ne l'avons pas encore traduit.