Set in Busan, South Korea during the 1970s, Lee Doo-sam builds an empire as a drug smuggler in the Busan underworld, while public prosecutor Kim In-goo attempts to take down Lee Doo-sam.
Busan, South Korea, 1970s. Lee Doo-sam is a small-time smuggler. After helping a drug gang to smuggle meth, he falls into the dark crime world. Quick-witted and full of ambition, he eventually takes over the drug underworld and starts to lead a double life: a good community leader during the day but an infamous drug lord during the night.