In 1939, during the "Isolated Island" period in Shanghai, Demon Cave No. 76 Was first established and Japanese special forces were rampant. Yan Shuangying, an underground member of the Communist Party of China, broke into No. 76 Under the name "Count" and walked on the edge of the knife. At the same time, Zheng Yaoxian, the top covert agent of the Central Special Branch, codenamed "Kite", was dispatched by Dai Li to the Shanghai Station of the Military Command to secretly lay out in the French Concession. The two hidden fronts do not know each other, but they shoulder a common mission. In the whirlpool of the espionage battle where it is difficult to distinguish between ourselves and the enemy, and where life and death are on the line, they will have a thrilling contest with traitor agents such as Ding Mocun and Li Shiqun, and stage a silent secret battle related to the life and death of Shanghai's underground organizations.
