In 1951, Tianjin, an industrial town in the early days of the founding of the People's Republic of China, was experiencing an undercurrent. The Kuomintang's latent agent "Iron-Blooded Anti-Corruption Group" used the code name "0409" to connect a series of cases of theft of grain warehouses and the murder of administrators in an attempt to undermine the economic construction of the new regime. With his keen insight, Lin Mo, the chief of the Public Security Investigation Section, peeled off cocoons from an eagle emblem and a piece of military canvas, and played games with cunning spies. Finally, he set up an ambush at the south dock of the city, disintegrated the spies organization layer by layer, and eliminated all the lurking enemy agents, protecting the tranquility of the city and the achievements of the country's construction.
