Some might think that Sir Bertram Topham Hat is an evil man, but he is not. On his railway, he let's any engine on his railway. But sometimes he sends them away like he did with his newest engine 'Diesel'. He sent him away because he told lies to the trucks. The big engines and a pannier were in that so they could not trust any diesels. Exept for Duck, who meets Boco and they soon become firm friends. Gordon meets him and the blue engine says that 'Boco is his hero'. But James and Henry along with Donald and Douglas have to become friends with the Buzz Box.