Under the neon lights of the city, invisible evil is hidden in the skin of ordinary people.
Serial murders occur one after another, and the shadow of old cases returns.
Lu Chen, the captain of the Criminal Investigation Brigade, charged into the battle, took charge of the front-line task force, had the overall situation in hand, and faced the dangerous scene directly under the pressure of the entire team;
Forensic doctor Jiang Yi uses a scalpel as a ruler to talk to the deceased and dig out every bit of silent evidence that the murderer missed from the mutilated corpses;
Su Yan, a criminal profiler, sees through the folds of human nature, dismantles the suspect's behavioral logic, and traces the outline of the devil.
A series of complicated and confusing crimes: secret poisoning in colleges and universities, secret rooms on cruise ships at sea, missing cases that have been left unsolved for many years...
There is no perfect crime at the scene, only the truth that has been deliberately concealed.
The three of them work side by side, with physical evidence, autopsy, and psychological profiling working in parallel to fight against the cunning murderer and clear away the lies and fog.
However, as the investigation deepens, they are shocked to realize that the multiple independent cases are not accidental. A huge underground network has already entrenched the darkness of the city, and even involves the scars of the three people's past that have been buried for many years.
The fierceness is pressing forward step by step, and the danger is approaching step by step.
When private past and public cases collide, how to choose between justice and emotion?
"The dead cannot tell lies, but those who lie are always the living."
Purpose: To depict the bond of mutual trust and mutual redemption between comrades, to face trauma directly, not to be held hostage by the pain of the past, and to still move forward despite the burden.