Shaken by an abusive experience, a young woman with an intellectual disability takes up the services of Kim Do-gi and his team of revenge seekers.

With an eye on payback, Do-gi transforms into a deep-pocketed customer to trick Kang Maria's tormentors. Kang Ha-na wonders about a missing criminal.

Do-gi goes undercover as a high school substitute teacher after receiving a call for help from a student who is being severely bullied.

The three bullies' attempts to mess with Do-gi come to a halt when they realize he possesses video footage that could ruin their lives.

While Ha-na looks into allegations of employees suffering physical abuse inside a powerful tech company, Do-gi poses as a new recruit there.

To gain access to Park Yang-jin's inner circle, Do-gi focuses his efforts on infiltrating a key department within the company.

As the truth behind an exploitative incident involving An Go-eun's sister comes to light, Do-gi sets out for revenge. Ha-na shows up with a warrant.

Do-gi finds himself in danger after Yang-jin gives him a cruel test of loyalty. Go-eun returns to locate and destroy the data servers.

Ha-na grows suspicious when she finds Do-gi's ID card at the scene of the explosion. Meanwhile, the team takes on a phone scam case.

Do-gi dons another disguise to lay his charms on the leader of the voice phishing operation. Ha-na keeps a close eye on the team's whereabouts.

Certain that Jang Seong-cheol and his employees are hiding something, Ha-na storms his home. A pastor worries about his missing son.

In mourning, Ha-na goes to Do-gi as a client in search of vengeance. While investigating, the team uncovers a larger scheme at play.

The team is taken by surprise when Baek Yeong-mi empties the secret prison cells. Do-gi plans to use Gu Yeong-tae as a bargaining chip.

When Yeong-mi comes after the team, Do-gi throws himself into action to save them from her cruel clutches before it's too late.

It's the end of the road for Seong-cheol and the team as they agree to shut down their operation. Do-gi is made to face the demons of his past.

The team pulls together for one final mission to nail the true culprit behind the death of Do-gi's mother. Ha-na attempts to resign.

Despite the disbandment of Rainbow Taxi, Do-ki is still out there going after bad guys. While keeping it from the rest of the members, Do-ki and Sung-cheol secretly help out a father who is searching …

Do-ki successfully infiltrates Cheongeum with the help of his old crew. He pretends to be an abducted recruit but secretly searches for Dong-jae. During the search, he runs into Lim Bok-ja. He uses he…

An elderly woman visits Rainbow Transport as a victim. She owes a lot of money because of a young scammer who only rips money off old people. Do-ki and the team get infuriated upon seeing this and set…

Rainbow Transport officially begins its operation to bring punishment to Sang-gi. The plan mainly depends on Sung-cheol being a loaded old man as bait. As soon as Sang-gi sees this and plans to scam h…

Do-ki runs into a stray little girl on the street. Out of concern, he takes her to Rainbow Transport and learns that suspicious people are after her. Do-ki and the team tries to infiltrate Feel Consul…

Do-ki and Go-eun get busted by Pil-seung for putting up an act. However, Do-ki manages to win back his trust by acting how desperate he is for a house. Now that they are back on track, Do-ki learns ho…

The next client is a woman named Lee Jin-hee. Her beloved sister Jin-sun is suffering from a terminal disease and is relying on a cult to cure her. To save her from the cult and to take down its leade…

The plan to destroy Ok Ju-man is now set. The only thing that remains is for Ju-man to take the bait. Although he does not have faith in any kind of religion, the Rainbow Transport team makes it seem …

A smelly drunk man protests alone in front of a big hospital. He claims that his daughter is in a coma due to a surgery malpractice. Although Rainbow Transport took him in as a client, they are not su…

Do-ki becomes a patient himself to infiltrate the operating room. When he is put to sleep, Go-eun finds out that there is a proxy who does the actual surgery while Young-sook goes somewhere else for a…

Do-ki makes it out alive from the car bomb explosion. He uses his death to track down the person behind the vicious attack. While his funeral progresses, Do-ki and the team monitor any suspicious peop…

After Do-ki gets kicked out from Black Sun and gets beaten up, the police arrive. However, the police arrest Do-ki instead. Although Yong-min helps him to bail out, Do-ki now knows that the police are…

An angry VIP client at Black Sun puts the security team on edge. The security team gets a second chance to make another delivery. Only this time, Do-ki joins the team. What he learns is shocking. Mean…

While Do-ki wakes up from getting drugged, the bishop comes back to Korea. Now that Do-ki has evidence of how Black Sun is circulating drugs, he sets up a plan. Meanwhile, Ha-joon notices that Rainbow…

Rainbow Transport takes in another client. However this time, it is a set-up made by the Bishop and Ha-joon. Not knowing that it is a trap, Do-ki blindly goes into Jangsan Correctional with Kyung-goo …

Do-ki goes into Jangsan Correctional as an undercover inmate. He fights all the way through every trap that Ha-joon has prepared for him. Although he barely makes it in one piece, he saves Lee Si-wan.…

A call brings the team together again. A girl named I-seo calls for help, but she disappears as soon as Sung-cheol answers. The investigation begins with only a name, but the team discovers that there…

Do-ki’s plan to meet the boss of the yakuza seems successful. He gains Matsuda’s trust in his own way and gets closer to the crimes they’ve been committing. However, an unexpected group of people appe…

A bolt-from-the-blue piece of news strikes Driver Oh, who had been preparing to operate his own private taxi. The Taxi Driver License he had hurriedly obtained ends up holding him back. When Rainbow T…

To catch the used-car dealer gang, Do-ki begins aggressively buying up their used cars. Becoming suspicious, the gang follows him after seeing that he even brings in a car carrier to purchase the vehi…

Dong Su was on the verge of giving up his life 15 years ago when he first met Mr. Jang. To right the injustice done to Min Ho, his son, Dong Su tried everything but failed. Mr. Jang helped him with al…

Do Gi and Chief Choi sneak into the gambling den to see what Im Dong Hyeon is up to. Do Gi even manage to take over Im Dong Hyeon's gym through gambling. Meanwhile, Dong Su passes out after attempting…

After learning that the gym was being used to fix volleyball matches, Do Gi returns it to Im Dong Hyeon for a bigger plan. He pretends to be a big-shot agent from Europe to win over Jeong Yeon Tae, a …

A fire breaks out at Im Dong Hyeon's gym, and he's found dead at the scene. Jo Seong Uk is also found drowned. The van transporting Min Ho's body is hit by a car, and the body is stolen. Do Gi and the…

While driving the Deluxe Taxi, Do Gi rescues Ro Mi, an idol trainee who jumped into the Han River. Ro Mi is facing a crisis where her debut could be cancelled because of the trap her managers put her …

On the day of Elements' debut, Ji An passes out, so Do Gi covers for her during the rehearsal. After seeing Do Gi's good performance, CEO Kang Ju Ri gives him more trust, and she even shares her dark …

Chief Choi tries to help Maria’s sister, Da Som, on his own, but he ends up getting scammed instead. The Rainbow Transport members learn about Yoo Min Jung, who was scammed like how Chief Choi was thr…

Do Gi finds the mastermind behind the resale app scheme, but the scammer gets killed by a bomb delivered by a guy in a fish truck. Do Gi and Mr. Jang trace the fish truck, which leads them to Samheung…

Do Gi and his group infiltrate the island and encounter a series of unexpected situations. Jin Eon and Gyeong Gu, who were tailing Writer Go, find themselves in danger, and even Go Eun, who was chasin…

Do Gi and his crew find out the entire criminal history of the Samheung Island criminal ring. Do Gi's crew sees how they don't even hesitate to kill people to achieve what they want, so they come up w…

Upon hearing the news that Master Sergeant Yoo Sun A, with whom he had served, has died, Do Gi immediately heads to the military unit where Master Sergeant Yoo last served. Before she died, she was de…

Do Gi finds the bird nest where the late Yoo Sun A left the intel and learns that she sacrificed her life to save her comrades. He also finds out that higher-ranking officers fabricated the special mi…