Detective Jang Jae Gyeong of Ahnhyeon's narcotics unit is forcibly addicted to a mysterious drug. As his body deteriorates, reporter O Yun Jin, his former high school friend, investigates a drug-related death and crosses paths with him again. Their pursuit of the truth entangles them with Geumhyung Group's vice-chairman and a prosecutor, unraveling a dark conspiracy tied to $50 million. As betrayals surface, Jae Gyeong vows retribution. But who is the real mastermind, and who will survive the battle?