The story follows the exploits of a Thai intelligence officer who must assume the identity of a slain lieutenant colonel in a neighboring country's military who was working as a double agent.
Section chief Kim (Kim Myung-min) was dispatched to South Korea 22 years ago to spy for the North Korean government. But spying is not his job anymore, or at least, it’s not what he does in daily life. Now, Kim makes a living by selling fake Viagra pills smuggled from China and returns home every night to his wife and two loving children.