Based on the stories, "Skarloey Remembers" and "Old Faithful" from Four Little Engines.
On the Skarloey Railway, Sir Handel (formerly known as Falcon) is pushed off the rails by some angry coaches. Skarloey, an old narrow gauge engine, is the only engine available to pull Sir Handel's train. He itches for a good run, and is determined to get his passengers home, even when one of his front spring breaks.