When his clan is wiped out by a beautiful demon, young Taikobo finds himself in charge of the mysterious Hoshin Project. Its mission: find all immortals living in the human world and seal them away forever. But what is the ultimate goal of the Project? And does Taikobo even know whose side he's really on?!

Taikobo and his allies arrive at the mysterious island of Horaito to fight a duel: seven of Taikobo's team against seven of his nemesis Dakki's minions in single combat.