Presents a graphic novel featuring a true story from the life of the author, Raina Telgemeier. One night, Raina and her mother both wake up with terribly upset stomachs, but they both think it is just a bug. When Raina returns to school, however, and the trouble doesn't go away, it only serves to feed her worries about changing friendships, school, and food. She has to find out what is going on, and fast.

"This graphic novel is based on personal experience, though certain characters, places, and incidents have been modified in service of the story"--Copyright page.