In Shanghai in 1941, late at night in the French Concession, Lin Qizhu was blocked by three traitors in an abandoned church. Behind him was a whole team of people from the Japanese Special High School - surrounded on three sides and surrounded by a wall. With a curl of his lips, a three-dimensional battlefield map of the entire neighborhood was instantly spread out in his mind. Twenty meters away, the "Innocent Female Student"'s watch had half a codename hidden in its reflection. The glimmer of light refracted by the three pinhole cameras under his collar was all invisible in the echo of his brain waves. Three seconds later, the traitors suddenly identified each other as "double agents," and the sound of killing each other alarmed half of the concession. This is just the most basic appetizer of "Secret War" - when he uncovers the mysterious scar under the cheongsam of the wife of the super high school section chief, the real "killing move" has just been revealed. The group of Japanese soldiers talking and laughing in German in the backyard of a foreign company whose house was raided was even more interesting.