Winter 1949, Beijing. A gunshot pierced the dawn, and the Kuomintang spy leader "Ye Xiao" fell to the ground. The person who carried out the execution was public security agent Lin Mo - this seemingly loyal revolutionary guard was actually a hidden Kuomintang agent code-named "Jackdaw". This public execution was his pledge of loyalty to the organization and the beginning of Operation "Resolution".
Just when Lin Mo thought the mission was completed, a secret order pulled him into a deeper whirlpool. The person sent by his superiors to assist him was Shen Qingqiu, a cryptography expert who had returned from studying in the Soviet Union, a woman with too many secrets in her eyes. What she brought was not support, but shocking news: the person who was executed was not the real "Night Owl", and the execution itself was part of a larger conspiracy.
As the investigation deepened, Lin Mo discovered that Operation "Determination" was far from simple as it appeared. There is a spy within the police, a traitor in the Kuomintang, and the legendary "Night Owl" may be hiding among the people he trusts most. What made him even more uneasy was that Shen Qingqiu seemed to know his true identity very well, but chose to remain silent.
When faith collides and loyalty becomes a double-edged sword, Lin Mo has to make a choice between personal conscience and organizational orders. And the incomplete code book in Shen Qingqiu's hand may hold the key to changing everything - if she can survive to decipher it. In this war without gunpowder, everyone is a pawn and everyone is a chess player. Until the last moment, no one knows who is fighting for what.
