The main character is an altar boy possessed by demons, who must fight supernatural forces and explore the unknown facets of the world of darkness. Daniel, who attends a schismatic church, has been possessed by a terrible demon. Now every good deed he does opens a portal to hell. He needs to practice virtue during the day, destroy monsters at night and try to save the life of his grandfather without plunging our world into the realm of eternal hellfire. During the course of the game, the hero not only fights demons, but also goes to school, communicates with people and goes to work.