A “gangster noir” set in the 1970s, when Gangnam, Seoul goes under development. Political powers and darker organizations collide as they seek to grab control of the influential and exclusive area.

Yi-Hwan (Lee Min-Ki) is a former professional baseball player. He was involved in fixing games and lost everything. Gang boss Sang-Ha (Park Sung-Woong) runs a money lending business and a gambling location. He makes Yi-Hwan work for him. Meanwhile, Yi-Hwan falls for bar owner Yeon-Soo (Lee Tae-Im).

A taxi driver is found dead, and Hyun-woo, the only witness, charged with a murder and serves 10 years in prison. While offering pro bono services, a lawyer Junyoung meets Hyun-woo, and they begin their journey to prove his innocence.