When national agent Le Li was investigating the case of North Korean criminals, he went under the pseudonym Xiaoye into an entertainment venue under the forest as an undercover agent. He happened to meet Ning Sishu, a North Korean prosecutor who went to the undercover under the forest to investigate South Korean officials. Ning Sishu is a Chinese-Korean hybrid who had met Le Li on a plane before. Le Li was ordered to temporarily protect Ning Sishu until he got on the plane. After several life and death tribulations, Ning Sishu, a simple and kind-hearted person, made no secret of his appreciation for Le Li, who was soft on the outside and strong on the inside. However, Le Li had a distant attitude and was reluctant to accept it.
