Below Hearing Threshold

The sound that the human ear can hear is above 20 Hz. What killed those people was the weird low frequency below the threshold of hearing. My name is Lin Shen. I was stripped of my fear when I was five years old. From then on, I have no inhibitions. As a criminal police officer, I didn't believe in ghosts and gods until I took over the murder case in that old building. Words seeped into the wall, there was an abnormal sound at the crack of the door, and the deceased frantically self-destructed in the resonance. Everyone is saying: The door is about to open, and the seven keys have been collected. And I am the last one. What is below the threshold of hearing is not the noise, but the fear that I have lost for twenty years. Once it awakens, I will no longer be a human being but an offering that opens the door. This time, I heard it and the whole world will hear it.