Set in the 1970s, Baek Gi Tae is an ambitious man who craves wealth and power. Jang Gun Yeong is a prosecutor with animalistic instinct and fearsome tenacity. Facing a major incident, Jang Gun Yeong throws his everything to stop Baek Gi Tae. The people around them include lobbyist Choi Yu Ji, investigator O Ye Jin, Bae Geum Ji and chief secretary Cheon Seok Jeong.