The engines are hard at work to build a new Search and Rescue Centre. 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 of the mysterious Misty Island, where he meets new friends Bash, Dash, and Ferdinand. Together they discover hideouts and try to help Thomas find his way home. Will The Fat Controller’s search party ever find Thomas?
Join Thomas as he heads off to main land to collect more Jobi logs for the new search and rescue centre on Sodor. Along the way he is uncoupled from the boat and ends up on the mysterious Misty Island.
It is not long before Thomas is found to be missing from the mainland and the Fat Controller soon sends out a search party but the mist is too thick over Misty Island for Harold to see anything.
During his time on Misty Island Thomas makes three new friends, Bash, Dash and Ferdinand. They are unlike any engines he has met before and at first thinks that he knows best and is unwilling to listen to his new friends.
Back on the island of Sodor Thomas’ disappearance is of major concern for the Fat Controller and his best friend Percy. Thankfully Percy remembers something Thomas said to him before he set off for the mainland, can Percy save the day??