One summer, Thomas comes across an old abandoned engine called Hiro. Desperately in need of repair, Hiro faces the Smelters Yard, so Thomas and his friends must work together to save poor Hiro from this fate.
The engines are hard at work to build the new Sodor Search and Rescue Center. When Thomas helps a friend in need, he is rewarded with an exciting trip to the Mainland. Along the way, he gets lost at sea and finds himself on the mysterious Misty Island, where he meets new friends Bash, Dash, and...
