Even if trapped in darkness, one will always search for the light.

This is a story of a young police officer searching for the answer to "Who am I?"

In the past, Xie Lanshan was an undercover drug enforcement officer who infiltrated the Golden Triangle's most feared armed organization as drug lord Mu Kun's right-hand man. After successfully returning to his post from the operation, an accidental case of police misconduct triggers a series of unexplainable headaches and hidden memories that begin to haunt him.

While investigating the truth behind his father's death of many years ago, Xie Lanshan utilizes his unique and sharp thinking from the perspective of a psychotic murderer to solve difficult cases around him. Plagued by this growing change and instability of both his mental health and personality, he meets a mysterious forensic sketch artist named Shen Liufei. Together, the two men will maintain a strange relationship; as friends and enemies, they solve mysterious cases one by one.

But, perhaps, there was another motive for the forensic artist to approach the young officer..

Renowned and popular webnovel author in China, graduate of Tongji University in Shanghai and a member of Shanghai's Writers Association. Notable works include Lip and Sword, In the Dark, and Gentries of the City. Jin Shisi Chai is known for her sharp writing, deep insight into social topics, and unique style of prose that earned her a loyal following of readers on social media. Many of her works have sold adaptation rights in China, from film to webcomics.