Nancy, Bess, and George are so excited. Their favorite new art teacher, Miss Alcott, is taking them on their best class trip yet--a sleepover at the River Heights museum! The girls can't wait to see some famous paintings, eat fancy food at the museum cafeteria, and have a great time with their classmates on the sleepover.

But when an expensive sculpture gets broken, the River Heights students get blamed. Nancy knows her class didn't do it, so it's up to the Clue Crew to find the real culprit before Miss Alcott gets in trouble and the whole field trip is ruined!