<p>15 years ago,Sarah Marine died gave birth to two twin boys by the seed of the Devil King Satan. The two boys,Daemon and Samael,were adopted and raised by an orphanage home,as instructed by the Order. One day,a demon invasion had caused the many to be injured and even killed,including Samael's death. From the day on,Daemon had sworn to become an exorcist and take his vengeance against Satan and the Legions of Hell.