Hunting a Murderer in the Dark

Haisheng City in July 2015. A mysterious man called the police, saying that he found a horrific female body in a certain community. So far, in just over two months, four cases of torture and murder of women have been discovered one after another with the same modus operandi. What is surprising is that the murderer, who has always been meticulous and leaves no clues, actually left a fingerprint on the deceased this time. Was this the murderer's negligence, or did he have some hidden agenda? Under the leadership of the newly appointed criminal police detachment leader Wang Yan, the police officers peeled off the cocoons and gradually discovered that the truth of the case was far from simple as it appeared. Those hidden behind-the-scenes manipulators, the men in black who come and go without a trace, the intricate human nature... As the people involved in the case surfaced one by one, Wang Yan was surprised to find that these people seemed to be inextricably linked to the kidnapping he experienced 15 years ago and his father's suicide...