Having made the decision to secretly join Iga's Grey Wolves, Miharu begins life as a member of the enemy ranks! Under the pretext of accepting an invitation from the long-hidden Kouga village to participate in an intellectual exchange among residents of the Nabari world, the apathetic vessel of the Shinra Banshou sets out with his new allies to steal Kouga's forbidden art scroll. But Iga is not the only shinobi village to whom the clever Kouga have opened their doors! Banten and Fuuma have also sent shinobi to the conference, and all those present-especially the Kouga-have their own interests to serve!