The Rainbow Deluxe Taxi is back in business. This time, a call from Japan brings the team together. A girl goes missing after making a call to the Rainbow Taxi. The only lead they have is her name and the phone she called. But even so, the team tenaciously looks for the lead, which is what they are good at. As the team investigates, they find out that there’s a Japanese loan company behind this case. With new cars and equipment, the team goes to help out the girl who needs help. Starting with this international case, the team will fight on behalf of everyone who has been wronged in this society again this season.
A call brings the team together again. A girl named I-seo calls for help, but she disappears as soon as Sung-cheol answers. The investigation begins with only a name, but the team discovers that there’s a scam game that lures teenagers, and there’s a Japanese loan company behind it. To find I-seo, the team goes to Japan.
Do-ki’s plan to meet the boss of the yakuza seems successful. He gains Matsuda’s trust in his own way and gets closer to the crimes they’ve been committing. However, an unexpected group of people appears. It turns out that the Interpol is also looking into this human trafficking case. Michael, the Interpol inspector, wants Do-ki to support the investigation, but Do-ki has his own goals.
A bolt-from-the-blue piece of news strikes Driver Oh, who had been preparing to operate his own private taxi. The Taxi Driver License he had hurriedly obtained ends up holding him back. When Rainbow Taxi discovers that there are serious issues with Driver Oh’s previously stolen Taxi Driver License, everyone steps up to help. Will they be able to catch the illegally operated car dealer?
To catch the used-car dealer gang, Do-ki begins aggressively buying up their used cars. Becoming suspicious, the gang follows him after seeing that he even brings in a car carrier to purchase the vehicles. Falling into a trap Do-ki has set, they ultimately end up signing a malicious contract — just as they once forced their victims to do.
