Gu Yu, the leader of the serious crime team, took over a serial corpse case that spanned five years. All the evidence pointed to a suspect who had long been "dead". When the case came to a dead end, Xu Sinian, a newly transferred forensic doctor, discovered that the case was related to his adoptive parents.
When the clues of the two unsolved cases gradually intertwine, they not only have to confront the murderer hiding in the dark, but also face the strange and suspicious issues of "witnesses recanting their confessions" and "evidence being destroyed" in the case. This time, should we catch the real culprit, or fall into a more dangerous trap?
Intention: win-win