Former special forces operative Kim Do Gi loses everything when his mother is brutally murdered. At the darkest moment of his life, he encounters Jang Seong Cheol, the CEO of Rainbow Taxi — a vigilante organization disguised as a luxury taxi service. Behind the wheel, Rainbow Taxi’s “drivers” are undercover operatives who track down criminals who have escaped the law, delivering justice in their own uncompromising way.
When one of their missions draws them into the world of predatory loan sharks, Rainbow Taxi senses a far more dangerous force lurking beneath the surface. Their investigation uncovers a link to an international human trafficking ring — a powerful and ruthless network that stretches far beyond Korea’s borders.
As the danger escalates, the team must consider expanding their operations overseas. The question is whether Rainbow Taxi can outmaneuver the trafficking ring’s masterminds and deliver justice on a global scale.