In 1995, in Gangnam, one of the members of the criminal gang, Jung Gi-cheol, is dissatisfied with being banned from dealing drugs, so he seizes power and kills his boss, but in the process, his best friend, Tae-ho, is also killed. Gi-cheol's business now flourishes, with organized drug production and shipments to Japan, attracting the attention of the police. A police officer infiltrates the organization under the guise of Tae-ho's cousin, and at the same time, the gang faces a conflict with the leadership in Busan.