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 him to hand over Jin's secret ledger in exchange for a plea bargain. Feeling the police closing in on him, Jin moves operations out of Korea. Kim nonetheless continues his investigation into Jin. Six months later, news about Jin's death stirs the country once again.