Choi Ik-hyeon, A customs officer, faces losing his occupation. Because he matches gangster Choi Hyeong-bae who has connection with all the 18, his life turns out. They form a partnership. Hyeong-bae helps Ik-hyeon set a firm with the amount of money from drug trafficking whilst lobbies for his partner Hyeong-bae. However, their partnership begins to crack as the federal government declares war on offense.