Lin Ding, a former programmer, lived a low-pursuit life by liquidating his shares.
The only quirk is that he delved into metaphysics - reading the almanac, divination, and geomantic omen, for his own entertainment, and he only half-believed it.
His brother Guo Yun, who had been missing for ten years, suddenly returned and invited him to a remote island.
There are three weird rules on the island: you are not allowed to go out after dark, you are not allowed to visit when you see events, and you are not allowed to approach the "sands at sunset".
Lin Ding used the rationality of a programmer to dismantle everything, only to find that logic ran into obstacles everywhere.
Interpreting it with metaphysical knowledge only yields more disturbing metaphors.
When he finally touched the unspeakable secret on the island, Guo Yun only left one sentence: "You will regret it."
What is Upside Down? Who are the red and white evil spirits? What is the truth?
When reason and metaphysics fail at the same time, the real fear has just begun.
