This week at Cinderella Cleaners, someone has dropped off a private-school uniform. Diana has always wondered what it would be like to attend a posh academy and now she has the chance to find out. Her best friend's cell phone is stolen, and in order to catch the culprit, Diana has to sneak into super-snooty Foreman Academy. But she never counted on mayhem, mean girls, and a pop quiz! Can Diana convince everyone she's a prep-school student, or will she flunk big-time?