Thomas' driver jokes that Thomas could almost run his branch line without him. Thomas does not realize he is joking though and becomes very conceited. He brags to Percy and Toby later at the sheds and both tell Thomas that he needs a driver, but to no avail.
The next morning, a fire lighter came and started the engine's fires. Thomas woke up as the warmth spread through his boiler and then realized his opportunity to run by himself and prove Percy and Toby wrong by stopping and wheeshing in front of them. Thomas slowly started moving along the track, but did not know that he was only moving because a careless cleaner had fiddled with his controls. Thomas quickly realizes he has made a huge mistake, but cannot do anything about it without his driver. At the end of the tracks sits the stationmaster's house. Thomas crashes through the front window just as the family was sitting down to breakfast. Plaster and broken glass was everywhere - the stationmaster's wife was furious with Thomas for ruining their breakfast. As Thomas' front has been badly damaged by his visit and is in disgrace, the Fat Controller is furious with Thomas for his silly actions and tells him that he is going become "Thomas On Toast". A Diesel railcar is going to be brought in to replace him on his branch line.