Narcotics runs a raid on Mu-jin; Ji-woo is unable to warn him beforehand but sabotages the raid, allowing Mu-jin to escape. Ji-woo plants the gun that was used to kill her father on the site, forcing the police to take it in as evidence. Mu-jin's second-in-command, Jung Tae-ju, questions Ji-woo's loyalty, while Mu-jin believes a mole is leaking information to Gi-ho. Jiwoo learns that Mu-jin is the Narcotics team's number one target, and Gi-ho has a personal vendetta against him to avenge a dead teammate. Gang-jae has become the head of his own successful criminal enterprise and is out for revenge, by directly competing with Mu-jin's drug business and attacking Mu-jin's gym.