Haijin City, the most prosperous concession city in the Far East, is also the deadliest spy battlefield.
Chu Wantang, on the surface, is a Chinese lecturer at Haijin Girls' Public School and a famous Kun Opera player, but in fact he is the most mysterious ace traffic officer of the underground resistance organization "Xinghuo Society", codenamed "Gu Yan". She practices a unique skill - "Heart Lamp Technique". She does not practice killing, but only practices perception. She can distinguish lies and predict malice in the dark. But her greatest weapon is not her cultivation, but her determination to never defend or back down.
When the traitor "Shou Zheng" betrays the organization and the liaison station is bloodbathed overnight, Chu Wantang finds that she is being hunted from three sides: her former fellow apprentice Li Hanjiang vows to catch her with his own hands to prove that his choice is correct; Sato Kiyogaki, an old monster in the alchemy stage, regards her as the most interesting chess piece on the chessboard; and her own organization also begins to doubt her loyalty.
In this world where pistols are more deadly than flying swords and conspiracy is sharper than cultivation, how can a female cultivator who cannot fight head-on use her mind as a blade to fight in the heart of the enemy to the end?
When the truth was revealed, the traitor turned out to be the person she was most familiar with; when the final choice was before her—to escape or to use her life to send out the final intelligence—she only said one sentence:
"The night is coming to an end, but the fire from the sky remains forever."
