In 1942, it was a dark night on the beach in Shanghai. Lin Mosheng, a talented doctor who returned from China, secretly completed the "Tingting Ceremony" in order to uncover the most lurking traitor. On the night of the first test, a bloody massacre came to the laboratory, leaving only the female agent Su Qing who was seriously injured and whose identity was a mystery. On the way to escape, the two discovered that the "demonic" brainwave holders picked out by the instrument were actually ordinary people distorted by the war, and the instrument data was obtained by the Japanese army to create "patriot" killers who had no emotions and were absolutely obedient. When trust becomes the most luxurious weapon, and when the brain becomes a battlefield to be spied on, Lin Mosheng and Su Qing must struggle between revealing the truth, destroying deadly weapons, and saving innocent people marked by instruments. A deadly espionage battle surrounding brain waves, human nature and the nature of war unfolds on the edge of the abyss of suspicion.
