Joseph is working as a priest in the day but he work as a demon hunter in the night, he's parents and siblings die because the demons massacre his family and He's the only one who left, He become emotionless and Cold person he never talk to much and he grow up in the orphanage and the pastor and the sisters in the church is a exorcist and demon hunter. He killing the demons for justice from his family and saving anyone from demons, he killing demons no mercy because of anger towards the demons.