Deep Threshold

This city never sleeps - not because the lights are on, but because there are people watching you in the dark. Shen Guan originally thought that his life would consist of puzzles, ancient books and unsocial silence, but a routine field trip allowed him to see another order that "will not be recorded" in the foundation of the city. Those silent echoes, the walls in the ruins that constantly corrected themselves, the whispers that looped in the night wind... They all seemed to be waiting for him. What's even scarier is that he discovers that he can "understand" them. From then on, his world could no longer be closed.