This is the story of an incubus named Emmerzael, who was sealed by the hero Aldrinne, in the chapel of Orsia twenty years before the beginning of the story. Now he wants to free himself and restore the forces that he lost during the years of imprisonment, while other evil beings want to prevent Emmerzel's return and increase his own strength to prepare for the arrival of Chaos, with which "There will come a time when the weak will be enslaved, and Strong will rule. "