Arc has been reborn as the "Black Dragon," with the power of Macht. He tests his new power on the inexperienced maid Wenna, pitting her in a duel against the swordswoman Celine. Meanwhile, Arc's father has fallen ill, and Arc's uncle has come to claim the throne of Nargala. Can Arc use his newfound power to protect his country as well as bending Wenna to his will?