Everyone at Lassie Lower School is busy getting ready for Grandparents' Day - everyone except Arnie. He doesn't have any grandparents to bring. But he has many other special grownups in his life. There is Mrs. Childs the school librarian, Coach Ed who is always ready for a game of catch, and Bill and Dottie who work at the bakery. Too bad none of them can be his grandparents. Or can they?