Akko, Lotte and Sucy receive detention for stealing a tart. They're also forbidden to go into town, even though Lotte is dying to go to a book event.

After drinking an experimental brew, Sucy falls into a deep sleep and won't wake up. To save her, Lotte sends Akko into Sucy's mushroom-filled dream.

Akko's quest to find Shiny Chariot leads her to seek a special chalice hidden at Andrew's prestigious all-boys school. She and Amanda sneak in.