Super-fast Kana is convinced that her speed is all she needs to win the Race for the Sodor Cup, a competition that draws engines from all over the world. However, when a racing practice gone wrong causes her partner, Kenji, to get hurt, Kana ends up paired with Thomas. Kana and Thomas will discover that it takes teamwork to become the best racers they can be, but is it enough to defeat the international champions and win the Sodor Cup?

After Thomas and Percy get spooked by a suspicious rumbling, the engines set off to figure out the secrets of the old mine inside Lookout Mountain.