In Shanghai in 1941, neon lights concealed the light of swords, and foreign companies hid hidden lines. Shen Yanqing, the "Yantai" of the underground party of the Chinese Communist Party, lurked in the periphery of the Japanese military's special high school as a trade specialist for British companies and foreign companies. His target was the Japanese military's top-secret "Pufferfish Project": a conspiracy involving financial plunder and intelligence control was quietly engulfing this isolated island.
He received secret orders at a teahouse in the French Concession, decoded telegrams with Tang poems, and met military commander Zhao Mosheng during a night exploration of the "medical warehouse" full of explosives; he was also in danger at Matsui's Hongmen Banquet, detecting the crisis from the note handed by Su Manli from Wang's Puppet Intelligence Service;
There is a tracking signal hidden in the codebook, the four forces confront each other in the church, the HSBC bank must protect gold from being bombed, and Sato must bet his life in the Grand Theater - when the ultimate trump card of the "Pufferfish Project" turns out to be a bacterial weapon, and when the mole "Egret" The tip of the knife was pointed at the comrade. When Su Manli and Matsui died together to save her brother, Shen Yanqing held the blood-stained pen and deciphered not only the Japanese military code between betrayal and sacrifice, but also the truth that faith will never be extinguished on an isolated island.
In the end, the "Pufferfish Project" went bankrupt and the intelligence network collapsed. Shen Yanqing stood on the streets of the French Concession, looking at the Japanese sentry in the distance, and began his next hidden journey - the island has not yet awakened, and the secret war continues.