A very rare, old tree has been struck by lightning, but will all the machines be able to pull together and help to repair the tree?
Buster feels left out when a big storm makes lot of damage on the Island of Sodor because there is nothing for a steamroller to do! When Miss Jenny discovers the soccer ground is covered in molehills she immediately calls for Buster!
A strong wind blows Kelly over damaging his wheels, but when he is called in to help Isobella he worries he will fall over, and hurt someone. Can he be brave and help out?
When Miss Jenny Sends Nelson the Ballast Tractor to carry Thomas for repairs, he confides in Thomas that he'd like to be carried by someone else. He is delighted when Sir Topham Hatt instructs Percy to carry him all the way back to the yard.
Working on the Sodor Rally Truck, Buster dreams of being the fastest steamroller. Max and Monty tease him for being slow but when they are all asked to test the track Max and Monty are so busy arguing that Buster rolls over the finish line first!
Ned is disappointing that his only job on demolishing a building is to clear up the rubble. When Oliver's wrecking ball won't knock down the building, Ned comes to the rescue.
When Patrick the Cement Mixer declares himself the most important machine, a huge disagreement breaks out. Miss Jenny points out that they should all work as a team and Patrick feels very silly!
Alfie the Excavator is sent to help demolish a building, but the other machines tease him for being small. Later when a mother cat and her kittens are discovered in the building only Alfie is small enough to rescue them.
It's a muddy day on the site and Miss Jenny tells the machines to be careful. When Alfie sinks in the mud because Max and Monty are not taking care, can Byron the Bulldozer save him?
The team are building a new school and Oliver is being careful to do a good job. he discovers a complete dinosaur skeleton and is very proud when he ends up on the front page of the newspaper.
Isobella does not like getting dirty, but when all the machines run out of diesel she has to get some more - by driving across some very muddy fields!