The train to Glasgow is about to depart from Donibristle Station. Mr. MacIver, the engine driver, is anxious to get going, and the guard is all set to wave his flag and blow his whistle. . . . But wait! Here comes young Donald MacBrain, racing full-tilt. Will he make it? Yes, and just in time! Donald, Mr. MacIver, the guard, various passengers, and some very lively feathered friends all play important roles in what turns out to be an unforgettable train ride to Glasgow.