Summer is a thrilling time for four boys who have turned thirteen. The fun never stops as Dougie, Dewey, Chick and Dan swim, fish, camp, play baseball, and find ways to earn spending money. What more could they want... until... they turn sixteen, and the summer becomes magical with the addition of a 1953 Plymouth they affectionately call "Big Edna." The car stretches horizons beyond their wildest dreams, and transports them to new destinations and more fantastic adventures.