This book tells the story of how a person who was once exiled by the system he believed in returned to the front line of chasing the murderer and used irrefutable evidence to piece together the truth - and the truth itself is often not salvation, but just a colder knife. Because there was a second murderer in a murder case seven years ago, Xu Fang was transferred from the criminal investigation post and was detained in the archives room to eat dust. When he was brought back by his old superior seven years later, he was no longer the sharp-edged crime-solving genius he had been. Instead, he was a silent middle-aged man who habitually checked all details over and over to prevent making mistakes again. The core proposition of this book is: When you once risked everything to believe that "procedural justice will make the truth emerge", but after being backlashed by the process, can you believe it again? If so, what do you believe in - the system, the people, or the physical evidence in your hand that no one can overturn.
