In 1941. Feng Jiu Si, the young police officer working within the British Concession, witnessed the death of a member of the underground Chinese Communist Party and was unfortunately marked as a suspect by the CCP. Meanwhile, the Japanese were amid clearing the anti-Japanese factions in Tianjin as they prepared to take over the British-French concession. As an undercover CCP member in the police force, Feng Jiu Si must prove his loyalty to the CCP as he works to uncover the plot of the Japanese.