There are rumors of a "Lighting Murder Case" in Fufeng. Wen Ning starts his investigation when he arrives in Fufeng and finds a man and his sister were murdered. At night, a fight breaks out between a mysterious black shadow and Wen Ning. His old acquaintance Lan Sizhui suddenly appears when the shadow escapes. Through joint efforts of Wen Ning and Lan Sizhui, the two finally solve the mystery and seize the criminal.

Near Qishan Mountain, there is a little town called Fu Feng, which is nicknamed the "City That Never Turns Dark". There, lies a legend of the "Lit Lamp Murderer". Wen Ning arrives at Fu Feng, and he realizes the abnormality of the town; the whole town is filled only with the weak and sick; and is very run down. When the night arrives, Wen Ning purposefully lit up a lamp to attract ghost shadows. Just as he was about to capture them, a ray of blue sword light appears and the black shadow disappears. Wen Ning looks up, and sees his famillar friend, Lan Sizhui. Wen Ning and Lan Sizhui decides to work together and solve the mystery and capture the culprit behind the mysterious incidents.