"The Island of Sodor is the home of the North Western Railway, with engines of all shapes and sizes, working hard to deliver goods and passengers to their destinations. There are branch lines that run along the coast of the island, serving the docks, the fishing villages and the seaside towns. There are branch lines that run to the farms, quarries and ancient castles of the island's heartland. And there is the main line, which runs all the way from Knapford on the west coast of the island, to Vicarstown, in the east. The line continues over the Vicarstown Bridge, where it connects to the mainland beyond. One day, Henry was pulling a very important goods train on his way to the mainland."