Adonis is obsessed with taking revenge for the death of his beloved mentor, but he isn't the only one nurturing the flame of vengeance in his heart. After leaving the shattered ruins of Markpoint behind, Adonis's journey brings him face-to-face with a girl of steel—Armored Yuki. Much as humanity stole from Adonis what was most precious to him, Yuki lost her beloved brother at the hands of the Witch's Apprentice. The conflict between magic and science rages anew as the two of them prepare their blades for an inevitable confrontation!