Mike Mulligan and his trusty red steam shovel, Mary Anne, are the best digging team around. Together, they have dug deep canals, cut through tall mountains, and created the cellars for towering city skyscrapers. You would be amazed by how much dirt Mary Anne can scoop up. But the world is changing fast. New gasoline and electric shovels are taking over, and suddenly Mike and Mary Anne find themselves out of work. Determined to prove that his beloved Mary Anne is still the best, Mike makes a daring promise to the town of Popperville. He claims they can dig the entire cellar for the new town hall in just one day. If they fail, they will not get paid at all. Join this inseparable pair as they race against the setting sun in a heartwarming adventure about loyalty, hard work, and finding clever solutions.