Qi Xiao, an ordinary person living in an ordinary world, accidentally stepped into a door leading to a strange space.
Behind the door is a world shrouded in taboo rules, and every inch of the air is filled with unknown fear.
Here, there are weird scenes everywhere: an old and gloomy abandoned hospital, with faint groans of pain coming from the hospital bed; a deserted and silent campus, with black shadows always peeping in the corners of the playground; a foggy town, with weird noises coming from the houses at the end of the street from time to time.
And behind every scene, there are rules that must be followed. If you are not careful, you will fall into a place of no return.
In this strange space, Qi Xiao went from being panicked at the beginning to gradually calming down. With his keen insight into the rules and tenacious will to survive, he escaped from death time and time again.
In the process of exploration, he met a partner who was also trapped here, and together they pieced together clues about this space and tried to uncover the secrets behind it.
