Underground River Surges

Shen Mo, a former criminal investigation policeman, was suspended because his partner died in the line of duty three years ago. He is now a private detective. He has a calm and thoughtful personality and is good at criminal profiling, but he suffers from intermittent amnesia due to traumatic memories. There was a 30-minute gap in his memory on the night his partner died. Lu Xingye, a genius with a PhD in psychology who specializes in criminal psychological profiling, was hired to assist the police in handling cases. On the surface, he is cynical, but in fact he is sharp and paranoid, and can detect lies through micro-expressions. When he was young, his father was falsely accused of being a serial murderer and committed suicide, vowing to uncover the truth. In Linjiang City, an ancient city in the south of the Yangtze River during the rainy season, a serial murder case occurred. The deceased was placed in a penitent posture, and a copper gear was stuffed into the throat. The murderer left a broken old-fashioned pocket watch at the scene when committing the crime, and at the same time played an old song "Dark River" from 20 years ago. Lu Xingye intervened as a consultant and found that the method was highly similar to an unsolved case 20 years ago. The pocket watch in the hand of the third deceased was engraved with the police number of Shen Mo's deceased partner. The police suspected Shen Mo was the murderer. Lu Xingye took the initiative to find an alliance with Shen Mo and proposed "mutual use" - he helped Shen Mo clear his grievances, and Shen Mo helped him investigate his father's old case. The two cooperate and compete, are both comrades and enemies. They are suspicious of each other, but have to rely on each other to decipher the secrets. The maze of memories, the reversal of identities, a game within a game, a plan within a plan, the story has climaxes one after another, and is full of suspense, making people want to stop...