Possession

Simon is an Exorcist. After the death of his twin brother in an exorcism gone wrong, Simon was raised in a shrine. Years later he and one of his friends from the shrine run a business offering exorcisms to those who are suffering from hauntings or demon possessions. Simon has managed to build as normal of a life as he can manage considering his ideal of a friend included witches, ghost and exorcist. He should of known that it wouldn't last. His memories of that long ago night haunt him. His nightmares begin to come alive when he encounters a demon from his past. His world begins to crumble around him as his past threatens to come back to life. We're his own personal demons trying to devour him? More importantly would he survive to find out?