Titipo had a little argument with Diesel. Then Titipo has to go on a long haul run, so he leaves the village for a while. Diesel regrets not making up with Titipo when he realized that Titipo had gone on a long haul. On the other hand, Titipo reaches the desert and sees a mirage and a strong sand storm for the first time in his life.

Titipo can't get in contact with Mr.Herb. Diesel worries about Titipo and gets even more anxious when he has a nightmare about a dragon trying to eat Titipo….

Diesel is the most mischievous train in the train village. One day, Diesel plays a prank on his friends as usual. As a result, Loco gets into an accident and Diesel suffers deeply from guilt….

Genie meets Congi after a long time at the country station. Congi's owner is looking for an owner who can look after Congi's baby. Genie unexpectedly says she can raise him….

Maintenance trains Fix and Lift are best friends like no other in the train village. One day, while they are practicing for a singing contest, they get into an argument about who's better at singing….

One day, Loco sees the freight train Tony who draws more than ten trains when he, himself wants to draw long trains. He gets a chance to draw a long train but he has to draw it together with Diesel, Manny and Berny….

Chichi the puppy is being taken care of by Mr.Herb and the little trains and lives with them at the train village. But Mr.Herb is worried because Chichi's mischiefs are getting worse by the day….

When Jenny, a brave freight train who saved Titipo from a sandstorm, comes to the train village, Titipo goes to pick Jenny up. But on their way back to the train village, they get separated….

Danny is the track maintenance train who checks the tracks in the middle of the night when the little trains are sleeping. One day, Danny promises to go on a picnic with the little trains but keeps dozing off….

Genie hears that there is a beautiful flower path and decides to go see the flowers. On the long awaited day she was going to go to the flower path, her friends suddenly ask her for help and she can't bring herself to ignore them…

The little trains promise to go to the railway stop festival with Eric. But on the very day, Eric faces an urgent issue and can't go to the festival. The little trains want to go to the festival but can't leave Eric behind….

One day, Titipo makes a big mistake so Mr.Herb works overtime to sort out the mistake. Titipo feels so sorry and wants to make sure that Mr.Herb take his breaks but somehow incidents and accidents happen one after another….

On Christmas Eve, Diesel happens to meet an engineer. The engineer asks for help, saying his steam locomotive is out of order. Diesel helps the engineer carry his luggage and suddenly he flies high up into the sky!

Berny is offered the role of the freight train in Guardian X's film. But the movie director is not satisfied with Berny's acting. At that moment, Berny's twin brother Manny, who followed Berny to the audition, catches the director's eye….

Eric usually finds it difficult to get along with young passengers. One day, he hears that kindergarteners are coming to the train village on a field trip. Eric is taking this opportunity to try and get along better with children….

The passenger train, Genie, and the freight train, Diesel, are arguing about whose task is harder. They ask Mr.Herb who's duty is harder and Mr.Herb suggests them to switch their duty.

Xingxing is not feeling confident because he can't sing well. Fix and Lift advise him to practice in a place where there's no one to hear him. Xingxing starts practicing in a closed warehouse….

Diesel and Rogi who became close really fast decide to go see the Supermoon together. On the day, Diesel is full of excitement but Rogi keeps dozing off. When the upset Diesel confronts Rogi, Rogi gets angry in turn….

Titipo is sullen after being scolded by passengers for frequent mistakes. Mr. Herb says that he also used to make a lot of mistakes, but it doesn't console Titipo. The depressed Titipo enters an unfamiliar tunnel while taking a walk….

Teo is excited to meet his favorite childhood super train 'Super Z.' However, on the day of the meeting, Teo misses it because he has to take care of Titipo and Diesel who get hurt while playing around.

Titipo, Genie, and Diesel decide to take on Setter's work while Setter is under maintenance. Setter's work which seemed easy enough doesn't seem to have an end. The little trains regret their inconsiderate behavior towards Setter….

Diesel encounters Gani who was babysitting the baby cars. The baby cars run up to Diesel and marvel at him. Diesel gets excited by the compliment and suggests that he show them his work place….

Genie suggests to her friends to go see the flowers. However, her friends are lukewarm about it while they get excited about the suggestion by Jenny who only recently came to the village. As this repeatedly happens, Genie becomes spiteful against Jenny….

Berny almost gets stuck inside the train wash due to its malfunctioning. He's about to tell Mr. Herb of the issue but decides not to because he was hurrying to get to the festival. However, he feels guilty and blames himself when Diesel gets stuck inside the train wash.