A group of magicians gathered at the Stafford Demon-Cutting Academy to discuss the revision of the "Magic Formula Book". This precious book cannot be read casually even by magicians, and there is a guardian to keep it safe. However, when a group of magicians arrived at the academy, the caretaker was suddenly killed! Dr. Nathan was ordered to investigate the case when he was in danger, but was attacked by a stealth attacker! Then, another magician was poisoned and murdered! Who is so brave that he dares to commit a crime in this place where there are so many masters?
