When every accurate profile of criminal profiler Ji Qingci was completely overturned by the new behavioral analysis expert Lu Chenzhou, he realized that he was not only facing a clever murderer, but also a blind spot in his own logic.
A corpse was carefully placed at the weather station, with strange blue powder on its lips; a sapphire cufflink that reappeared in the world connected unsolved cases three years ago. In order to trace the truth behind the death of his best friend Lin Mu, Ji Qingci found that he had become the number one suspect. And Lu Chenzhou, who was ordered to evaluate him, had eyes that could see through everything. He was both a regulator and a gravedigger.
In this peak showdown between reason and intuition, they are forced to form an alliance. However, behind every case, there is a huge shadow called "Scavenger" - it kills in the name of justice, and its tentacles penetrate into every corner of the city.
When the evidence begins to lie, and when trust becomes a luxury, the only thing they can rely on is their completely different but unexpectedly compatible ways of thinking. Because the deadliest traps are often set by your deepest desires.
This is a story about sin and redemption, and it is also a legend of two lonely souls testing each other and supporting each other in the darkness, and eventually becoming each other's only light.
"Lu Chenzhou, what if I am the pawn on the chessboard?"
"Then overturn the chessboard." He replied calmly, "I'll accompany you."
