Hiro is one of the strongest engines on Sodor. He is also very polite and gentle, even when he's pulling the naughty Troublesome Trucks. Diesel tells Hiro that the only way to get the trucks to behave is to give them a bang and a bump, but Hiro is not convinced. So Diesel sneaks up behind Hiro and encourages the Troublesome Trucks to misbehave even more, forcing Hiro to lose his temper and cause an accident. Thomas blows the whistle on Diesel, who soon finds himself learning from Hiro how to deal with Troublesome Trucks in a more polite and gentle manner. Thomas and Bertie love racing, but Thomas gets annoyed when Bertie starts winning all the time. When Thomas discovers Bertie's been re-routed and has taken a shortcut, he decides to try to take a shortcut too, despite Annie and Clarabel's objections. But when Thomas comes off the rails, he realizes the error of his ways.