Jin Jung is a troublemaking prosecutor of the Central District Office. With a strong sense of justice and craziness, he punishes criminals more than they deserve. A Ra is Jung's partner, a competent prosecutor who always judges issues objectively and handles them with a clean finish. Also at the Central District Office is the elite prosecutor Do Hwan, who believes money and power are everything. He is a man who is willing to do whatever it takes to go higher up. In a world corrupted with wealth and evil, the story of these prosecutors unfolds.