In front of Jiangcheng National Security Investigator Chen Yan's morning meal, an unfinished bowl of hot dry noodles was interrupted by an emergency call - the sealing ring intercepted at the dock actually matched the underwater interface of the top-secret "7·11" project. The shadow of the codename "Fisherman" emerges. At the same time, Tan Jing, the special commissioner of the Ministry of National Security, arrived in Han and formed a partner with Chen Yan. From copper coin codes to abandoned air-raid shelters, from university professors to foreign affairs cadres, the two followed clues in the intricate streets and docks of Jiangcheng, and gradually uncovered a spy network disguised as "academic exchanges" and "business cooperation." The enemy is hidden and we are exposed, and the inner enemy is hidden deep inside. Every technical consultation and every foreign-related activity may have hidden murderous intentions. Amid the fireworks of hot dry noodles and the sound of the Yangtze River, a silent war about core technology quietly started. There are no rains of bullets here, only the smiles beside the tea cups, the handwriting on the drawings, and the choices buried deep in people's hearts that are heavier than the 3,600-meter water pressure.
