In the 27th year of the Republic of China, Chen Cheng, a soldier of the National Revolutionary Army, found a code book with a gold-gilded cover in the scorched earth of the Battle of Xuzhou. This original text recording the Japanese army's "Black Wind Project" involved him in a pursuit that lasted for more than ten years. From the Songhu battlefield to the foggy capital of Chongqing, from the secret mansions in the occupied areas to the wilderness villages in the civil war, Chen Cheng not only had to avoid the sharp blades of the Japanese special education class, but also beware of the hidden guns of the military's "anti-corruption team" and the Central Military Commission's "investigation section". He developed a complicated relationship with Yoshiko Kawashima (a fictional character of the same name), a Japanese female spy code-named "Sakura", during several life-and-death encounters - she was the bait to trap him and the only confidant who could see the cracks in his soul. The secrets of the codebook were uncovered layer by layer, involving treasonous transactions by military and political officials and a bloody chess game between the Kuomintang and the Communist Party. In the smoke of the Anti-Japanese War and the artillery fire of the Liberation War, Chen Cheng transformed from an ignorant soldier into a survivor wandering in the gray area, and the code book coveted by countless people finally reflected the greed and redemption of human nature in the ashes of history.
