The series depicts the story of a prosecutor who truly punishes corrupt powers with expedient and trickery.Jin Jung (Doh Kyung Soo) works as a prosecutor. He relies sometimes on expedient action and trickery, rather than standard practices of law. At the same time, he has a deep sense of justice and conscience. He will stand on the side of the weak and fight against the wicked, extracting eye for an eye justice. Meanwhile, Shin Ae Ra (Lee Se Hee) is a senior prosecutor at the Central District Prosecutors’ Office with perfect work skills and social skills.