Haiyuan City, a wrestling field between light and darkness.
Zhou Linchuan, an expert in criminal psychology, is the core of Haiyuan City's secret task force "Lighthouse". He is calm and restrained, and is good at discerning the truth from the smallest traces. The mysterious disappearance of his sister during his childhood made him hate crime deeply. The silver pocket watch he wears is the only relic left by his parents, and under the dial, there is an encrypted memory that no one knows about.
Bai Chen, the chief think tank of the Matrix "Deep Blue", is a genius with antisocial personality. The little finger on his right hand is missing, but he can weave the most sophisticated traps on the keyboard. He ignores the rules but sticks to a bottom line - never harm innocent people. No one knew that when he was twelve years old, in order to protect a girl he had never met, he personally cut off the finger that symbolized "obedience".
A carefully planned series of "suicide" cases brought the two people together on a narrow road.
SOS signals are engraved on the bodies of the rich, chemicals in the swimming pools are used to fake the time of death, and all clues point to the "Black Water Project" that was buried five years ago. Zhou Linchuan discovered that there was a miniature camera hidden in the eyes of every deceased person; while Lu Chen realized that the anonymous commission he received actually came from a person who had long been "dead".
They tested each other and had to join forces.
"The day your sister disappeared, there was a blue rain, right?"
"When you severed your finger, the laboratory surveillance actually captured the entire process."
When Zhou Linchuan's pocket watch stopped in front of the key evidence, and when fragments of childhood memories emerged from Lu Chen's code, they were shocked to realize that the chessboard of this game had been laid out fifteen years ago.
And the chess players are staring at everything through their eyes...
Intention: In the darkness of chaos, those who fight against fate will eventually become each other's light