The Rainbow Deluxe Taxi is making a comeback. Even though the crew disbanded after Do Gi achieved his successful revenge, Seong Cheol, Go Eun, Gyeong Gu, and Jin Eon can't resist reuniting with him. Though they try to lead ordinary lives with regular jobs, their innate desire to fight against injustice always finds a way to bring them back together. The company even has a new employee. On Ha Jun is a kind-hearted, albeit clumsy, young man who stumbles upon the secret basement of Rainbow Taxi. The crew, fighting for everyone wronged in an unequal society, takes on more clients than ever. However, a mysterious organization is after Rainbow Taxi this time. The organization reveals its presence by killing one of the villains Do Gi is pursuing, but they quickly disappear without giving him a chance to uncover their identity.