Lee Hwan, a former professional baseball player, finds his life in a downward spiral after getting caught up in a game-fixing scandal. Disgraced and pushed out of his career, he returns to Busan and soon becomes involved in the seedy underworld of loansharking. Drawn to the charismatic loan shark boss Sang-Ha, Lee Hwan is quickly pulled deeper into the criminal organization. As he rises through the ranks, his newfound aggressive tendencies and leadership skills earn him a reputation, making him indispensable to Sang-Ha.

As Hwan becomes more entrenched in this dark enterprise, he meets Cha-Yun, a bar owner with her own troubled past. Their relationship complicates when personal loyalties and ambitions clash within the gang. Tensions mount as rival factions move in to test Sang-Ha's grip on power. A simmering power struggle breaks out, and Hwan finds himself at a dangerous crossroads where he must decide between loyalty to Sang-Ha and his own ambitions for control. Each choice he makes drags him further into a web of violence and treachery, leading to consequences he could never have anticipated.