In the aftermath of Touma's fight with the magician Stiyl Magnus, Touma flees the dormitory with a gravely injured Index. Touma turns to the 103,000 grimoires to save Index, but while there is a way to heal Index's wounds, she points out that Touma is unable to perform the magic needed. In order to find someone else that has not been exposed to the Power Development Curriculum, he heads to the Tsukuyomi Residence to look for his teacher.