Wu Xie gets pulled back into the mountains because a ghost of a friendship won't let him stay buried, and this time the thing waiting for him isn't just another tomb, it's something older than tombs. The show trades the claustrophobic puzzle-box plotting of earlier chapters for something stranger: vast underground spaces that feel like they're watching you back. It knows the real horror isn't what's hiding in the dark, it's standing in front of something so ancient and patient that your entire life is just a blink to it.
Wu Xie has settled back into normal life after years of dangerous expeditions when Lao Yang resurfaces with an old proposition: return to the Qinling Mountains and finish what they started three years ago. The hinterlands hold secrets they barely survived before, but this time the mystery runs deeper. Within those ancient ruins lies a colossal tree that shouldn't exist, one that seems to anchor something far older and stranger than history should allow. As Wu Xie and Lao Yang venture into the mountain's forgotten depths, they navigate underground rivers teeming with impossible creatures and caverns that defy natural geography. The tree pulses with an otherworldly presence, and the closer they get, the more reality bends around them. Unknown to them, Zhang Qiling has been working in the shadows all along, his own connection to these mysteries pulling him into their orbit once again. This is underground archaeology meets supernatural horror, where each discovery peels back another layer of something vast and unknowable buried beneath the earth.