Nam Gi-jun, a former top gangster, returns to Seoul’s criminal underworld after 11 years to uncover the truth behind his younger brother Gi-seok’s mysterious death. The city is controlled by two rival gangs, the Juwoon Group and the Bongsan Group, whose uneasy truce is threatened by hidden betrayals and power struggles. Gi-jun’s quest for vengeance begins, revealing dark secrets and dangerous alliances.