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?