Milly and Molly helped Biddy Bid and Aunt Maude repair their long-damaged friendship. But when each of the older women mentor each of the girls to compete against each other in the Giant Pumpkin Competition, the tenuous friendship between Aunt Maude and Biddy Bid quickly breaks down. Milly and Molly worry that the same thing could happen to their own special friendship. Can they all find a way to compete and remain friends?