Ông Trùm: Jin Hyun-pil, the founder and chairman of One Network, is seen as a multi-level marketing mogul by society, but to his loyal followers, he is a savior, a philanthropist. He is a cunning criminal, holding a large illegal fortune and backed by ruthless figures in the fields of politics, media, and law in South Korea. Financial Police Team leader Kim Jae-myung and his team have been tracking Jin for a long time and are determined to capture him. After discovering that Jin's organization is supported by IT genius Park Jang-gun, Team leader Kim asks him to cooperate with the police. Caught between loyalty to Jin and fear of imprisonment, Park finds himself in a difficult situation. However, he comes up with a plan to tu the tables and escape with a large sum of money. At the same time, Jin receives information about a spy within the organization and is determined to find the traitor.