The Flame-Horse Clan (The Hiba Clan).Kuro, Keita, and Akane head to Okinawa, staying with Keita's grandfather in order to confirm whether Keita's mother had really died when he was young or not and what to investigate in the island. The three later come across Kakuma and Makana, survivors of the Hiba Clan, who mistake Kuro to be after a Tera Stone within the area. Meanwhile, Reishin has started plans to gather all the Master Roots under the protection of the Kaionji Group, with the assistance of Daichi Kuraki. As the trio continue to enjoy their Okinawa vacation, Hiyou and Shinobu Nanase arrive in Okinawa as well, preparing for another mission to locate the Tera Stone.