1941年。进步青年、英租界警务处探长冯九思亲眼目睹了他的入党介绍人的牺牲。日军大本营派遣阴险的小仓直人来到天津，为占领英法租界做准备。小仓严密布局，利用残忍的秋本，对天津抗日组织开始了一系列的破坏。...

In 1941. Feng Jiusi, 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 Jiusi must prove his loyalty to the CCP as he works to uncover the plot of the Japanese.