Taxi Driver

Despite the disbandment of Rainbow Taxi, Do Gi is still out there going after bad guys. While keeping it from the rest of the members, Do Gi and Seong Cheol secretly help out a father who is searching for his missing son. To confirm his whereabouts, Do Gi sets off abroad to a foreign country to accomplish his first mission.

Do Gi 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 her revengeful anger to make it easier to find the missing boy. Just when he is about to capture the mastermind, a mysterious gunshot interrupts his arrest.

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 Gi and the team get infuriated upon seeing this and set up a plan to prevent this criminal from ever scamming the elderly again.

Rainbow Transport officially begins its operation to bring punishment to Sang Gi. The plan mainly depends on Seong Cheol being a loaded old man as bait. As soon as Sang Gi sees this and plans to scam him, he does not realize the karma that he is about to face. Meanwhile, the secret organization Do Gi is after is also keeping an eye on Do Gi as well.

Do Gi 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 Gi and the team tries to infiltrate Feel Consulting and get some info on Kang Pil Seung to find out why he is in search of this poor little girl.