Build Sound

I was greedy for cheap and moved into an old residential building with a monthly rent of 400 yuan in the city center. On the first night of my stay, at exactly twelve o'clock in the morning, there was a strange sound of building walls coming from the wall. A shovel, a piece of ash, and a brick, as if building something alive into the wall. I went to the property management company to inquire, and I only got one sentence that made me shiver: "There was an incident in this building three years ago, and something... Was hidden in the wall." I wanted to escape, but found that the corridors were endless and all the doors and windows were locked. The person standing at the door late at night is not a neighbor, but a shadow demanding life; What came to my ears was not noise, but the sound of bones being sealed. The landlord is guarding, the property is hiding things, and the neighbors are waiting. I didn't understand until I was trapped and died in the building—— This is no ordinary old building, it is a tomb made of living people. And I am the next brick sealed into the wall. Close the door at midnight and do not open the door if you hear the sound of masonry.