Knocking on the Door of the Old Building at Night

The knock on the door of a dilapidated dormitory building in the middle of the night is not a friendly greeting, but a signal demanding life. Lin Cheng, who failed the college entrance examination, moved into a musty small room on the fourth floor to make a living, but discovered the secrets of the old building and the factory. The strange fire on the rooftop, the iron box diary, the disappearing workers, and the warning that followed him everywhere forced him into a desperate situation. Don't open the door at night, don't trust the person next door - but he has nowhere to escape.