In 1944, the storm was about to come. Lin Yue, codenamed "404", is a triple spy lurking in the Nanjing military command. He is nameless and invisible, shuttling between the enemy and ourselves in Operation Gray Line, instigating rebellion, monitoring, and assassinating, and stepping on the tip of a knife every step of the way.
The enemy regards him as the god of death, and his colleagues regard him as a tool, but he only lives for one thing: to find the black hand behind everything.
In the age of war, every identity may be false and every choice may be fatal.
He wants to live between truth and falsehood until the moment the truth emerges.
——The gray line is not broken, and the action never ends.
