At nights, prisoners leave the prison to commit perfect crimes. Ik-Ho is an inmate who wields king like power in the prison. Yoo-Gun is a new inmate charged with hit-and-run, destruction of evidence and bribery. He is an ex-detective with a 100% arrest record. Ik-Ho pays attention to Yoo-Gun who has a strong will and hot temper.

Martial law is declared when a mysterious viral outbreak pushes Korea into a state of emergency. Those on an express train to Busan, a city that has successfully fended off the viral outbreak, must fight for their own survival…

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.