In 2003, Song Zhiyuan, a young engineer from Huateng Institute, went abroad for the first time to attend a conference and fell into a honey trap carefully designed by the "principal" of a foreign intelligence agency in Germany. The turning point in his life after a glass of red wine dragged him into the abyss of espionage for eighteen years.
From the initial non-core information to the core algorithm of the "Skylark Project", Song Zhiyuan gradually became a "mole" amid fear and greed. Every compromise is like a piece of a puzzle, sending the secrets of China's next-generation stealth drone "Huan Chu" overseas bit by bit. The sudden death of his mentor, the threat to his daughter, and the collapse of his ego - he fell deeper and deeper into the quagmire, unable to extricate himself.
At the same time, national security investigator Lao Zhang spent four years laying a dragnet. In Cuihu Park in 2021, a thrilling arrest brought an end to this long secret war. However, the identity of the "principal" is unknown, and this war without gunpowder has never stopped.
