The film tells a flashback to the intense story of the past. Set against the backdrop of 80's Korean society in which the dictatorship was in power. When the head of the international intelligence agency "Park Pyeong Ho" (played by Lee Jung Jae), who is recognized for both skill and credibility. Must come on a cunning mission with "Kim Jong Do" (played by Jung Woo Sung), the head of the National Intelligence Service. Both of them doubted the principle of the other.