After a string of assaults that drained the enchantments of both teachers and pupils, headmistress Liza Quillyn opts to lock down the College, making it impossible to enter or exit, preventing anyone from leaving and ensuring no one can come in while the campus remains isolated from the outside world and safeguarding the remaining students.
Confined within the walls of the College, Chise Hatori and her classmates begin to acclimate to their new and demanding situation. Yet as days pass, Philomela Sargant's state deteriorates further—both mentally and physically. Meanwhile, revelations about Lucy Webster's sorrowful history keep emerging. While Chise wrestles with concerns for her friends and her own identity, the source of the mysterious force draining magic may finally be uncovered for the safety of everyone.
