In 1995, Linglong Town was surrounded by mountains. This place was once the site of the third-tier state-owned Linglong Instrument Factory. Later, it suddenly stopped production and closed the factory. Since then, Wuling Mountain has been shrouded in thick fog that persists all year round. In the past seven years, nine townspeople have mysteriously disappeared. There are widespread rumors that Lingshan is hiding something and the old factory is killing people...
