Huaijiang, whose real name is Qinhuaijiang.
When he was young, he was trapped in the original purgatory and saw the most piercing evil and despair with his own eyes. His biological father committed a murder and escaped overnight. His old family was broken up and the night was always cold.
He buried the past with his own hands, cut off his name, was admitted to the police force under the name Huaijiang, and delved into criminal psychological profiling, just to catch up with the darkness hidden in the abyss and keep the light that no one can take away anymore.
On the first day he was transferred to the serious crime team, he met the captain Li Zhihong.
Li Zhihong is the sharpest criminal investigation knife of the city bureau. He is cold-blooded and cold-blooded. He only believes in iron-clad evidence and never believes in popular deductions. However, he only makes exceptions again and again for Huaijiang, who is full of mysteries and worried.
A series of unsolved cases begins, murders occur one after another, and the clues are strange and difficult to find. The two went from being wary of each other and testing each other at the beginning, to fighting side by side in desperate situations.
As the case progresses, old case files that have been dusted for many years are uncovered one by one. The truth behind the disappearance of the biological father, the undercurrents hidden within the police station, and the buried lives all gradually come to light.
When personal hatred and justice are in opposition, when the biological father stands on the opposite side of justice.
Huaijiang stood on the edge of the abyss, in a dilemma; and Li Zhihong always stood by his side, blocking all criticism and swordsmanship for him.
The long night is filled with evil.
They took the police badge as an oath, fought with each other, stepped through the darkness, and finally welcomed the light of day.
Mission: Even if the night is dark, justice will never be absent