Im Cheol-ryung is a special investigations officer in North Korea. On one of his missions, Im Cheol-ryung and his team go to a warehouse that prints counterfeit money where they find their superior Cha Ki-seong stealing the master plates with his team. A shootout takes place where Im Cheol-ryung is shot and members of his team killed. North Korean officials later learn that Cha Ki-seong has fled to South Korea. Im Cheol-ryung is ordered to capture Cha Ki-seong and retrieve the stolen master plates. He is given only three days to complete his mission. For the first time, South Korea and North Korea decide to cooperate to catch a criminal. South Korean officials however, are doubtful whether Cha Ki-seong is really a killer. Detective Kang Jin-tae from Seoul is ordered to closely watch over Im Cheol-ryung while he is in South Korea. Together, they must retrieve the stolen plates and bring Cha Ki-seong to justice.