D.W., younger sister of Arthur the aardvark, hates a lot of food but spinach is at the top of her list of no-nos. Frustrated by D.W.`s behavior when spinach appears on her plate at a restaurant, her parents declare that she will now stay home when the family goes out to eat. D.W. is pleased to be excused from eating spinach but finds staying home with a babysitter very dull. When she learns that her grandmother`s fancy birthday party is to be held in a restaurant, D.W. discovers that being a picky eater can be a real problem.