On a rainy night in Jiangzhou City, on the carousel in an abandoned park, a female corpse wearing a red dance skirt was placed in a final gesture. When Qin Lie, captain of the criminal investigation detachment, was overwhelmed by this ritualistic serial murder case, the appearance of specially hired profiler Lin Zhixia brought the investigation of the case into a whole new dimension.
One is a "mad dog" in the police force who believes in "results of justice", is extremely powerful, and is good at tearing holes in the dark; the other is a mind reader who adheres to "procedural justice", is calm and rational, and can understand the psychology of criminals from the subtleties. From the initial conflict with each other, the two gradually got together in a series of high-intelligence crimes such as the "Puppet Master Case" and "Rainy Night Pianist Case". Qin Lie's wild intuition and Lin Zhixia's accurate profile perfectly complemented each other.
As the investigation deepens, they discover that the murderer did not commit the crime alone, but there is a mysterious organization code-named "X" hidden behind it. All the clues in the case actually point to the two people's dusty past. When the conflict between procedural justice and consequential justice escalates, and when personal grudges intertwine with the truth of the case, can this pair of powerful partners hold on to the bottom line at the edge of the abyss and uncover the mastermind?
Purpose: The novel uses serial murder cases as the starting point to explore the complexity of human nature. The murderers in each case are not simply "evil men". They may be victims harmed by their original families, or they may be marginalized people forgotten by society. Through the profile analysis of the protagonist team, readers can see the psychological causes behind the evil, triggering thinking about whether human nature is inherently evil or the environment creates evil.