Geologist Chen Mo went deep into the X-level forbidden area "Blackstone Rift" to search for the missing team of mycologists. Under the rift, ancient mycelium weaves into a living abyss, spores erode consciousness, and the rock walls pulse like the breath of a giant beast. When the team members become symbiotic puppets one after another, they discover that the fungus is imitating human distress signals. In order to destroy the intelligent sclerotia, the survivors bet on their last sonic weapon - and the abyss is turning their fear into nourishment.
