When George's mom asks Bess, George, and Nancy to help her cater a benefit for the library, everyone agrees. The event is a Jane Austen-themed tea party, and George even agrees to wear a dress for the occasion! It seems like the party isn't everyone's cup of tea though. The bed-and-breakfast where the event is being held has been plagued by vandalism. Someone is breaking teapots, making a mess, booby-trapping the staircase, and generally terrorizing the old couple that towns the place. No one can figure out how the intruder is getting in and out of the house - and that's when Nancy gets to work!