At three o'clock in the morning, Chen Mo received his last takeout order. The address is a tube building that is about to be demolished in the old city. When he climbed up to the sixth floor and knocked on the rusty iron door, he smelled the strong smell of blood. There were no lights on in the room, and the light from the phone screen revealed a pale face and dark red liquid spreading on the floor. The person who ordered the food lay in the middle of the liquid, his eyes wide. Chen Mo's cell phone rang again, this time it was an unfamiliar number: "Leave the takeout at the door, don't be too fussy, just leave." But he couldn't leave - there were heavy footsteps coming from the stairwell, and there was more than one person.
