Long gets an invitation from Tayo and heads to the playground. He takes his inconvenient trailer on his back, worried about his look with out it. However, the long trailer only distracts him from playing…

The little buses unexpectedly discover an old underground roadway. Tayo and Rogi show interest, but Lani feels scared. Lani's friends tease Lani and angry Lani leaves the underground roadway first, but heavy rain starts to fall.

The shaky slide collapses as Tayo and his friends all slide down together. The friends blame Rogi for suggesting to ride the slide together. Rogi thinks it is unfair and shouts back at his friends. Will Tayo and his friends be able to play happily together in the playground again?

Rogi and Lani want completely different things for the new playground. They each try to gather more friends to create a playground that follows their opinion. The fierce competition begins to turn into a fight…

Rubby installs a water tank and becomes a sprinkler truck to help the strong heavy vehicles. However, due to his soft heart, Rubby is always late to the construction site as he stops to help his friends on the way. No longer being able to wait, Poco decides to give Rubby one last chance

As Windy's video becomes viral on CarTube, Rogi gets jealous and also starts CarTube to gain popularity. However, instead of gaining popularity, Rogi becomes known for filming a video that he accidently took of Frank…

Hana and Citu present a new garage to each of the little buses. Rogi and Rani both brag and argue that their place is better. However, they start to feel like their friend’s garage is actually better…

Heart sees an advertisement of Joey picking an assistant for his magic show. Heart applies for the role to entertain her friends. However, Heart fails to show her ability as she gets intimidated by the prominent candidates…

The little buses get an opportunity to drive travelers to the airport. Gani's heart leaps with excitement, dreaming that he can finally meet the plane he has always admired. But Cargo, the new plane, isn't like what he had thought…

Trammy is excited to visit Namsan Mountain and give her friends a gift she made with pretty flowers. However, her friends want to go to the amusement park. Trammy, who is unable to leave because of her tracks, ends up just watching them…

Tony is upset as he is always late at delivering because of the traffic lights. Then, he finds a cool hat with superpowers. Tony realizes the power of the hat and changes all the traffic lights in front of him into green lights…

The little buses visit the airport to meet Cargo and run into ground operating cars "Towing," "Loader", and "Tug" who help the plane. The little buses are amazed by their skillfulness and ask them if they can try working as a ground operating car...

The strong heavy vehicles go to a filming set for construction and end up starring as Rangers in a new movie. While the vehicles are flustered by a challenge they have never faced before, Tayo decides to help them training. But Tayo's practicing gets out of track….

Tayo and Long finds a stray kitten in the playground. They want to take care of the kitten, but there is no place to go because Citu and Loco seem to dislike cats. To make matters worse, they discover that the kitten in the garage has disappeared….

Tayo wishes he had his own garage as he experiences inconveniences while sharing the garage with his friends. Tayo wakes up the next day to find that everyone is out. Tayo is excited to enjoy the garage all by himself. But playing alone is not as fun as he thought and some scary things start to happen...

Lani goes on a picnic to the forest with her kindergarten friends. However, a kindergartener leaves the group and disappears chasing after a deer. Realizing that the child has gone missing, Lani steps into the woods to find her friend…

Iracha does not receive a painting like the other cars at a kindergarten picnic and thinks that he is not cool. Meanwhile, Iracha gets a job at the Guardian X filming site. Iracha starts to receive attention from his friends as they hear that he is working at the set of Guardian X…

The little buses go to a warehouse in the amusement park to find Halloween makeup tools. They meet a clumsy ghost car in the dark warehouse. The little buses become friends with the ghost car, as he is not as scary as they thought…

Shine is excited to be up on the same motor show stage with Reo, the car that he has always admired. However, Shine is greatly disappointed to find out that he is an extra. Nevertheless, Shine tries to do his best but almost ruins the stage with exaggerated actions...

Bongbong accidentally falls asleep in Long's container while playing hide-and-seek and follows Long to the port where he works. Despite Long's warning not to do this next time since it is dangerous, Bongbong secretly follows Long again…

Citu watches the Guardian X show that the little buses watch by chance and falls in love with the ardent hero, Guardian X. However, he hides the fact that he has become a fan because he is a little embarrassed for liking a children's program...

Little country bus Cooku is playing in the new city playground. Wanting to show off, he invites the little buses to his town and brags about the cool places in his neighborhood. However, no matter how hard Cooku looks, everything is plain and ordinary. With the help of Champ, Cooku works hard and finally finishes a place to show the little buses. But even that place gets messed up by the rain and wind that blew all night...

The little buses keep causing trouble and make things difficult for Hana. Gani unintentionally overhears Hana and Teo's conversation and thinks that Hana is leaving Train Village. The little buses do their best to turn Hana’s mind...

The kindergarteners are happy for Alice's visit, but are soon terrified to hear that she has come to vaccinate them. Alice hears the conversation of the children and thinks that they are scared of her…