A new engine named Belle, a BR Standard Class 4 modified with water cannons on her water tanks, extinguishes a fire, but she runs out of water. Thomas and Percy take her to the Steamworks where Sir Topham Hatt congratulates her and says they need another fire engine. Belle suggests a road-rail hybrid fire engine she knows named Flynn and arrangements are made to bring him over from the Mainland. Thomas starts to spend more time with Belle and later Flynn when he arrives. Percy feels left out, as well as from everyone else, and is convinced by Diesel, to visit Diesel's friend Diesel 10, at the rundown Dieselworks. Diesel claims that Diesel 10 will be Percy's mentor and new best friend. Diesel 10 informs Percy that Sir Topham Hatt does not care about the state of the Dieselworks, and Percy says he will ask Thomas for help regarding it.
