It depicts the story of the Traffic Crime Investigation Team (TCI), which tracks only car crimes such as insurance fraud, retaliatory driving, self-harm blackmail, leka, call jump, and autonomous driving. Cha Yeon Ho, a rational individualist from KAIST, and Min So Hee, a traffic investigation ace with cool judgment and warm sensitivity, track unusual traffic crime cases with the traffic crime investigation team to uncover the truth behind them.


Do Gi, a former Special Forces officer, is consumed by grief after his mother is murdered by a serial killer. He joins Rainbow Taxi, a secret organization that delivers revenge to victims the law couldn't protect. As he becomes a star driver, he faces prosecutor Ha Na, who investigates Rainbow Taxi's lawless methods while questioning their ability to bring justice. Torn between revenge and the pursuit of justice, Do Gi seeks to understand what true justice really means.