“니 내랑 부산 접수할래?”

친구 ‘동수’(장동건)의 죽음을 지시한 혐의로 수감된 ‘준석’(유오성). 17년 만에 출소한 그는 몰라보게 달라진 세상과 어느새 조직의 실세로 성장해있는 ‘은기’의 모습에 위기감을 느낀다. 

‘준석’은 아버지 ‘철주’(주진모)가 평생을 바쳐 이뤄놓은 조직을 되찾기 위해 흩어져있던 자신의 세력을 다시 모으고, 

감옥에서 만나 자신을 아버지처럼 따르는 젊은 피 ‘성훈’(김우빈)을 오른팔로 두게 된다.

“담배 떨쳐가 우리 아버지 죽이라고 신호 줬다면서예?”

친아버지의 얼굴도 모른 채 불행한 어린 시절을 보냈던 ‘성훈’은 마치 아버지처럼 자신을 챙겨주는 ‘준석’에게 의지하며 그와 함께 부산을 접수하기 위해 힘쓴다. 

그러던 어느 날 ‘성훈’을 찾아온 ‘은기’는 ‘동수’의 죽음에 대한 이야기를 풀어놓으며 ‘성훈’을 혼란에 빠트리는데...

 두 남자의 숙명적인 만남!

 친구를 잃은 그 날, 끝나지 않은 이야기가 시작된다!

The Great Legacy begins 17 years after where the previous film left off. Lee Joon-seok, who claimed responsibility for ordering his friend Dong-soo's murder (despite having nothing to do with it), has spent a lot of time behind bars and now he is released to a world that is as unfamiliar to him as the criminal organization he used to lead. With his subordinate Eun-ki now practically parading as the boss, Joon-seok, a leader by nature, secretly embarks on a mission to subvert his current position. He invites Choi Sung-hoon, whom he'd met in prison, and Sung-hoon's gang to join in his plan. Sung-hoon is the twenty-something son of one of Joon-seok's female friends in high school who now works as a bar hostess, and he had been serving a one-year sentence for beating his mother's abusive boyfriend. Having developed a respect for the charismatic Joon-seok in prison, Sung-hoon willingly takes his side. But when he discovers the truth behind his background, this creates great tension between the two. Interspersed are scenes of Joon-seok's own father, Lee Chul-joo as a gangster who founded the criminal organization in 1963 Busan.