In the late autumn of 1937, the Shanghai Concession was still as prosperous as ever. Public concession patrolman Zhou Yuanqing originally just wanted to survive in these troubled times, but during a night patrol, he accidentally touched half of a burnt code manuscript from a corpse. He didn't know that he had cracked one corner of the Japanese army's "Phantom Plan", and he didn't even know that the package of "printing waste" that his sister Zhou Xiaomei, who was applying to be a typesetter, secretly brought home last night, contained all the keys that could expose the entire plan.
