Sodor Day is coming, and all the engines are busy preparing. When Thomas gets lost in the mountains, he discovers the old town of Great Waterton. Sir Topham Hatt puts Thomas in charge of restoring the town in time for Sodor Day with the help of his friends. Thomas is so busy restoring the town that he doesn't have time for his usual duties so Stanley, a new engine, is brought in to help out, much to Thomas' dismay. Pierce Brosnan narrates.