Thomas is tired of pushing coaches in the yard and wants to explore. One night, Edward comes to shed and offers to swap duties with him. Thomas accepts the offer but it involves taking the Foolish Freight Cars, which he isnt used to. Hes unaware of the fact that they like playing tricks on engines, especially those who arent used to them. After what seems like a pleasant journey for Thomas, the Cars push him down the hill and almost make him crash into some buffers. In the end, Sir Topham Hatt tells Thomas he has a lot to learn about Freight Cars - - and when he does learn, hell be a Really Useful Engine.