Kim Dougie, a former special forces soldier, joins the Rainbow Taxi Company after her mother was killed by a serial killer. The company is ostensibly a taxi but is actually a secret group to avenge victims. With skilled driving and martial arts skills, Dougie pursues unsolved cases: from student harassment to organized crime. Prosecutor Kang Hana, who wants legal justice, confronts them and sometimes cooperates. Jung Sung-chul, the company’s president, leads the team. Each episode has a new case with fast-paced chases and fierce battles. Dougie is caught between the grief of the past and the new justice. Based on true crimes, the story combines revenge with moral questions and maintains tension until the end.
