Kang Soo is a detective with a strong sense of justice and ambition. One day, he receives a report from an unknown source that contains information about a large organization that commits heinous crimes such as drug smuggling. Kang Soo who infiltrated the organization under a disguise to clean up the crime worked with the president's right arm, Yong Shik, and the two feel a strange friendship as they form a team for their own purposes. Meanwhile, Kang Soo is in danger of revealing his identity during the ongoing secret investigation, and the more he digs into the case, the more he faces the shocking truth about the organization... Two men jump into a world where revenge and betrayal intersect, an unbelievable team play is about to begin!