Su San, a witty reporter with an extraordinary sense of smell, and detective police chief Luo Yin team up to solve a serial murder case in Shencheng; fighting to protect the people, social justice, and each other.
In 1936, a member of a patriotic organization named Huang Weijie goes on a mission and happens to meet a patriotic businessman, Feng Guanyu. The two were childhood friends who were separated due to a misunderstanding. Feng Guanyu insists that Huang Weijie become his bodyguard. Despite their constant conflicts, they share a common ideal of justice in the face of adversity and join forces to dedicate themselves to patriotic causes.
