Guo Rong, 29 years old, is an ordinary white-collar worker at workstation 1807 of an office building.
On Thursday night when he was working overtime, he found that his filing cabinet could not be opened. At the edge of the door crack, there is a circle of light-absorbing black. The next day, no one in the company remembered that he had reported for repairs. The maintenance worker opened the cabinet door in front of him - there were only folders and dusty leather shoes inside.
That night, the cabinet door opened again. The folders disappeared, replaced by a downward brick passageway, the floor littered with twenty-year-old cigarette butts. Morse code came from deep in the passage: S. O. S.
Lao Zheng, the night shift security guard, handed him three peeled eggs and said only one sentence: "Don't go in. Twenty years ago, the foundation of this building was an air-raid shelter."
Guo Rong began to record: on the first day, there was half an extra subway ticket in the passage; on the third day, a baby cried from the depths; on the seventh day, he crawled thirty meters in and found another mug at his work station.
Meanwhile, colleagues began to forget about him. The administration couldn't call him by name, but the delivery boy said, "This building doesn't have an 18th floor." A text message from "himself" appeared on his phone: "Don't believe the person who came to see you tonight."
Guo Rong discovered that the crack under the workstation was connected to a "mezzanine world" abandoned by time - all the corners that had been demolished and forgotten by reality would reappear there. And the "forgotten haze" released by the rift is erasing his existence bit by bit.
He must find the truth before he is completely forgotten by the world: Who is asking for help? Why is the disappearance case 20 years ago related to him? And - standing by him every night
