Neon flashes, evil lurks.
He is a lonely detective with a heavy past, cold eyes and warm heart. Lu Yuanhang, with logic as his blade, dissects the puzzle and vows to pursue every bit of the truth;
She is Su Muqing, a calm and professional psychological profiler who has insight into the subtleties of people's hearts. She uses empathy as a bridge to point to the source of crime and strives to explore the abyss of human nature.
When "Smiling Dolls" suddenly appear in the city, when "Whispering Rooms" hide murderous intent, when "Serial Arson" burns out hope... A series of bizarre cases test their wisdom and limits, and also reflect the most twisted obsessions of human nature. They join forces to pursue the murderer in the dark corners of the city and search in the fog. And under every cold case file, there seems to be an invisible thread, quietly pulling the bloody mystery in Lu Yuanhang's heart about the disappearance of his loved ones that has been dusty for many years...
The battle between good and evil, the entanglement between love and law. When he stares into the abyss, will the abyss give him the final answer?
