Honk your horns toot! toot! Its the traintastic world of Chuggington where eager engines Wilson, Koko and Brewster are learning to become working trains. Harrison must return to the training yard if he wants to pull the royal carriage, Wilson will do anything to avoid the automatic Chugwash, Koko cant resist exploring, the Chuggers find going backwards isnt as easy as it looks and driving smoothly isnt for dummies and could that be Old Town Mystery Chugger on the tracks?