A sharp-eyed worker named Siyul catches the eye of Mudeok, a low-ranking Mapo bandit.

After days of working without pay, Siyul has had enough. Eun finally begins her long-awaited job, and Chun becomes a military officer after passing the state exam, but the world they face is far more corrupt than they had imagined.

Mudeok blackmails Siyul. Chun and Eun are overcome with anger and helplessness as they face corruption at every turn.

Siyul begins to adapt to his new life. Chun hears an unbelievable story from Eun, and Wang Hae makes a move that causes tensions to rise.

Siyul attempts to establish a new order as winds of change begin to blow throughout Mapo; Chun uncovers a dangerous truth while investigating a missing horse case at the police bureau.

Chun is framed; Eun's petition brings trouble; Siyul faces a nightmare from the past.