In 1990, South Korean President Roh Tae-woo launched a "war on crime". During the crackdown by the Busan police, Choi Ik-hyun (Choi Min-sik), a gangster behind the scenes, was arrested for detaining an entrepreneur, which revealed his legendary story of wandering between the black and white worlds... In 1982, Choi Ik-hyun, then a civil servant in the Supervision Department, was like a fish in water in the lucrative customs, but his boss pushed Choi Ik-hyun out to take the blame when he was reported. Choi Ik-hyun, who had a bleak future, made a desperate move to start a drug business with Japan, and was able to meet Choi Hyung-bae (Ha Jung-woo), a gangster of the same clan. Choi Ik-hyun, who was proud of his origin in the Choi family, soon formed an alliance with Choi Hyung-bae. The two created a world in the underworld world of Busan with their own connections and violence. In 1985, Cui YiXian entrusted by entrepreneurs, the shares of nightclubs and Cui JiongPei should join forces to bring down Busan gangster leader Jin Banhu, Cui Gang gang up, the relationship between wing Yin and Jiong Pei, in the turmoil in the torrent of rifts ...