Martial arts expert Lee San and master sleuth Ayo were working as bodyguards-for-hire, but to little success. However, they were dismissed by Interpol officers a year ago. When a vague commission leads them to a hotel room in Incheon, South Korea, a terrorist bombing duly takes place and turns the bumbling investigators into fugitives. Their informant dies, but the pair also immediately find themselves pursued by a rival group of bounty hunters. After an exhilarating car chase, San and Yo join forces with a trio: Bossy heiress Kat on an anti-terrorist mission since her lost childhood Swan, who is the resident hacker and maker of fantastic gadgets, and the muscled Bao Bao. To clear their names, they must work with the trio to track down the culprit of a series of bombings that have plagued an international hotel group. After many hurdles, they manage to capture the bombers and the duo are proven innocent.