Chapter 1

Once one of their bathrooms gets tagged with graffiti, Shirley returns to Lutheran Sumatran High School in Virginia to solve another case for them, but she lets Diane help this time. Shirley also tells Diane about the last case she solved there because she asked. After explaining how they almost got away with it, Diane thought maybe they should try to get The Campaign Prank Squad to help them catch the culprit, and they do.