Men of the Underworld: Chapter 5 (2016)
The 5th film in a 6-part series. After his beloved Ji-hyun (Otsuka Rina) is murdered, Umehara (Ozawa Hitoshi) hides his grief while searching for the spy, armed now with information from the North Koreans. Tadano (Namioka Kazuki), who is indeed one of the WRC embedded spies, is informed by Inspector