Carry, the carrier car, drops Bong Bong, the baby van, by mistake. Suddenly left all alone, Bong Bong luckily runs into Tayo. They have fun together while Tayo teaches Bong Bong about the traffic rules. Tayo takes a real liking to cute Bong Bong and invites him to the garage. Meanwhile, Carry fin...

Upon finding a bus stop covered in graffiti one day, Rookie and Pat decide to investigate. But conflict arises as Rookie wants to use cutting-edge technology while Pat insists they patrol on foot. Caught up in their argument, they lose the culprit. Unwilling to give up their respective methods of...

Gani stands in for Cito as a one-day teacher introducing what a bus does to kindergarten students. The heavy vehicles and cool cars like patrol car Pat and fire engine Frank all gather at the education center to participate as a one-day teacher.
Gani becomes timid as he listens to the heavy veh...

Toni is on his usual delivery route when he meets Tayo and gets invited to the garage. In his hurry to finish up his work and go play at the garage, Toni accidently delivers a child's toy to the wrong house. Big hears about this mistake from the child's father and tells Toni that he made a wrong ...

Nuri had been humiliated at a singing contest she entered with Speed at a taxi get-together. This time she decides to enter with Tayo who can sing well. Suddenly, Rogi imposes himself on them, saying he wants to go, too.
But Nuri can't go to the get-together with Rogi who has a terrible singing...

While on their route, Tayo and Rogi save the garbage truck, Rubby, from trouble. Later, they discover an old parking lot by chance and have such fun playing there that they return to the garage late. Tayo and Rogi are dirty from playing in the old and dusty parking lot.
Hana and Cito scold them...

By chance, Tayo saves Nana who was in trouble. Nana lives in the country and she's visiting the city. So when Tayo shows her around the city in a very skillful manner, Nana thinks that Tayo is the boss of the buses. Tayo feels good upon hearing someone call him, "boss," so he doesn't deny it, and...

All morning, Nuri encounters unfortunate events until eventually, she gets in an accident. While getting repaired, she learns that the little buses are going to ride a cruise ship today. Nuri wants to ride a cruise ship, too, but becomes disappointed when she learns that there is no more space av...

One day, Tayo finds a treasure map in the storehouse. Greedy for the treasure, each of the little buses try to secretly find the treasure on their own. After pretending to go somewhere else, they each look for the treasure to no avail. They realize that they deceived one another and get into a fi...

One day, Lani accidentally breaks the car wash. Afraid she'll get scolded, she keeps it a secret. Meanwhile, Rogi declares he'll find the culprit who broke the car wash and, acting like a detective, starts asking the little buses a lot of questions. Lani can't answer Rogi's questions straight awa...

One day, Rogi brags about the rubbish he's collected to the little buses. But the other little buses get angry at him because the rubbish is so dirty. The next day on his route, Rogi meets a camping car named Windy who has the same taste as he does. Rogi feels close to Windy who says that he trav...

Accidents keep happening on the parking lot playground. So Hana decides to elect a playground leader to maintain order on the playground. Lani, Toni, and Speed are all vying for the position, and with Rubby somehow thrown into the mix, suddenly, there are four candidates who want to be the leader...

Cito always helps the little buses, but he is also sometimes strict. The little buses feel a bit uncomfortable around Cito because he always looks like he knows what he's doing.
They think Cito is an entirely different kind of being. Then one day, Buba, the grandfather bus who was Cito's predec...

The princess of a neighbouring country visits Tayo's city, and upon seeing her, Lani desires to become a princess as well. Realizing that she can never become a princess, Lani starts to become ill. To cheer Lani up, Hana suggests that the little buses treat Lani like a princess for one day.
The...

Tayo is envious of the grown-up buses who can drive around until late and can sleep in until late in the morning. By chance, Tayo helps a grandmother car, Wizard car who turns out to be a wizard. She says she'll grant him one wish.
Tayo uses his wish to become a grown-up. Tayo is happy that he ...

Hana invents a machine that can shrink anything. Hana strictly tells Tayo not to touch the machine, but Tayo, who is full of curiosity, touches the machine anyway and gets hit by a mysterious ray.
The ray shrinks him into a tiny toy bus. Just then, Rookie and his niece, Jinnie, visit the garage...

On the day people say shooting stars will fall, Tayo thinks of Princess Ray of the Clover planet. That night, Tayo and the little buses wake to the sound of Princess Ray's voice calling them from afar.
The little buses hear Princess Ray's request for help because she's been captured by Bully. S...

Tayo infiltrates Bully's castle with Quick and finally meets Princess Ray. But when he's about to escape the prison with Princess Ray, the prison gates suddenly close and Tayo is now also trapped in the prison.

As always, Speed and Shine once again wreck the downtown roads while racing each other at breakneck speed. Rookie and Pat become angry and order them to do something good and receive a stamp.
Upon learning that if they can't get a stamp, then they'll be banned from the roads, Speed and Shine ha...

One day, Gani gives Jerry, the neighborhhood's most reckless troublemaker, a ride. Because of Jerry's mischief, Gani finds himself in tough spots every day. While contemplating on how to stop Jerry, Gani turns on the TV installed on the bus. Joey's Magic Show is on, and Jerry becomes immersed in ...

Air is a new rescue helicopter that has come to the fire station. Tayo is completely taken with Air after seeing him bravely save people, and asks him to become friends. The other little buses hear about Air and hope they can become friends with him, too. They try to approach Air, but small misun...

Rogi hears about Frank and Alice who are stressed out because of prank calls, and vows to catch the culprit. He sets out as a self-appointed detective with Gani. The only lead is that the culprit has a deep male voice. With that clue, Rogi and Gani try to find the culprit.
But Rogi once again m...

In the dead of the night, the heavy vehicles that were working at the old factory come to hear the story of the ghost car. All the heavy vehicles start to act like they're not bothered, saying there's no such thing as ghosts. But when they hear a ghost's cry from afar, they all run off in terror....