An average girl. An abnormal life. A story about a legendary book called "Grimoire", has been hidden for several years. Each handed down from generation to generation. Magical people guard it and put their lives at risk just for it not to fall into the wrong side. Along with the book comes a pendant called "The Crimson Pendant". It is the key to opening the book. The book is kept safe by the 9th Guardian. But the pendant is not. It has been lost for years. Legend says, a guardian was also assigned to protect it. But was failed to do so. The whereabouts of the pendant are unknown, but darkness is on the move. One wrong move and the humanity falls.