After returning from camp, Lucy is still unconscious and it's still not clear what's behind her sudden loss of strength...this worries Chise deeply.

While watching over Lucy, Chise discovers her connection to Seth and their family's tragic history. While a professor seems to have been the victim of a user of a banned book, a mysterious killer seems to resurface...

The College is sealed off to protect the students and staff from whatever or whoever has been sapping magic from victims. Zaccheroni puts the students' survival abilities to the test, but with a catch: no sorcery allowed.

Bored with having nothing to do but study, the students play a puzzle game, but it stirs up bad memories for Philomela and Rian. Alcyone ponders her assigned role. As the rainy season starts, Elias and Chise finally sit down to catch up.