On the eve of the demolition of Building 19, there was a knock on the door in the room that had been vacant for many years.
An old man died behind the door. Everyone said that they did not go in, but the recording left behind called Shen Yan's name.
Five years ago, Shen Yan's sister Shen Qing fell from the old laboratory building. The death that was deemed accidental left only a deleted list and eleven minutes of video blanks.
From "non-existent residents" to "people who did not attend the funeral", Shen Yan and investigator Cheng Wu gradually discovered that some people did not kill with their own hands, but they concealed one thing at the most critical moment.
The truth is not only hidden in the testimony, but also in those few minutes that everyone avoids talking about.
