 Duck has settled in well on the Island of Sodor, so much so that the other engines are getting a little tired of his know-it-all attitude and new-found pride in the Great Western Railway following a visit from the City of Truro.They are pleased when a smooth-talking diesel engine – simply known as Diesel – arrives to help out.When Duck shows him up, Diesel vows revenge, and starts spreading malicious lies about Duck (forcing him to be sent away).