"What's your name?""Althur." He weakly replied. "Arthur." The man muttered. "No sir, Al-thur." Althur remembers that time. Althur was an orphan who was picked up from the cemetery on a cold night by his mentor. Years later, when he was about to graduate, he received news that his mentor had died suddenly. A strange mirror leads him to a city where an exorcist has been killed under mysterious circumstances. Following these suggestions, he went to a city to investigate the mysterious death of an exorcist. What could happen? Non-existence. How to find it.