PHJang Jae-Kyeong (Ji Sung) is an ace detective on the drug task force at Anhyeon Police Station. His life's motto is that weakness in success happens when personal connections and supporters are involved. To avoid that pitfall, he keeps a distance from friends, fellow police officers, and even his own family when he senses it could cause trouble. He is a person with strong convictions and principles. A crisis then occurs in his life. He is forced to become addicted to drugs by someone. With the death of his friend as a clue, he reveals the whole story of connections within a 20 year corrupt friendship.
Meanwhile, Oh Yoon-Jin (Jeon Mi-Do) is a local news reporter for the Anhyeon Economic Daily Newspaper. She is very self-assertive and says things without reserve. Due to her personality, she was unfairly fired at her previous job. It wasn’t easy for her to get hired in the same field. She decided to focus her reporting on corruption and return to Anhyeon City. As a reporter for the Anhyeon Economic Daily Newspaper, she gets involved with Detective Jang Jae-Kyeong.