Jin Hyun Pil runs ‘One Network Inc.’, a company with an extensive network covering Korea. The chief of the Intellectual Crime Investigation team, Kim Jae Myung, suspects One Network’s involvement in a fraud case of unprecedented scale. Kim tracks down the company’s IT architect and brain, Park Jang Gun, and attempts to persuade Park to hand over Jin’s secret ledger in exchange for a plea bargain. Feeling the police close in on him, Jin moves operations out of Korea. Kim nonetheless continues his investigation into Jin. 6 months later, news about Jin’s death stirs the country once again.