Brewster is going to be carrying Mayor Pullman, the new Mayoress of Chuggington, across the newly re-opened Border Bridge in the traditional welcoming ceremony. During the practise run, some of the facade falls off one of the bridge's pillars. It looks as though the ceremony will have to be cancelled, as the bridge might not be safe! At first Brewster is devastated - but then he saves the day by using something Dr. Ling's been working on: her new soap was a disaster in the chugwash, as it set into rock hard foam, but it's perfect for repairing the bridge! Safety restored, Brewster proudly carries Mayor Pullman into Chuggington.