Buster the steamroller challenges dump trucks, Max and Monty to a race.
Thomas takes Buster to the newly built Sodor Racetrack to smooth the track, but Max and Monty tease Buster about being slow and challenge him to a race. When the work is done, Miss Jenny allows Max, Monty, and Buster to test the racetrack. Max and Monty race off with Buster trundling behind, but Max and Monty end up in a ditch, while Buster trundles ahead and wins the race.