george is a small green steam engine who works happily at the flour mill, proud to do his bit with a whistle and a smile. but when george begins to lose steam, he’s sent to the works and faced with a big change — a new oil-burning boiler. worried he won’t be a ‘real’ steam engine anymore, george fears the others won’t accept him. with help from his square friend sandy, george learns that being different doesn’t mean being less. a heartwarming tale about change, self-acceptance, and discovering that the best engines are the ones who keep going.