A talent manager loses his handphone which contains a scandalous video which could destroy his career. He is then contacted by a mysterious caller who has found the phone and blackmails him into committing a series of crimes.

Despite their different family backgrounds, four friends grew up together in the wearisome years of the 70s. But as time goes by, each of them takes a different life path.

Kang-soo is a third-rate street thug in Busan; he's an alcoholic and gambling addict who's always on the run from loan sharks. But when his rebellious teenage son Jong-chul is diagnosed with kidney cancer, he tries to be a real parent for the first time and seeks out Jong-chul's biological father, Tae-suk, a pimp. Tae-suk, however, refuses to help.

Min-cheol, who murdered his wife, is loading her body into a trunk and moving into the mountains. Mi-yeon refuses Min-cheol's offer to dispose of the body with him and reports it to the hunter (detective).