The Chang'an Fog: Traces in the Western Regions

The Fog Over Chang'an is set in Chang'an in the tenth year of the Tianbao era. It follows Shen Qingci, daughter of the Grand Astrologer, and Li Jingyan, a lieutenant general of the Imperial Guards, as they investigate a series of murders linked to star charts and become entangled in a shocking conspiracy spanning twenty years. Every victim is connected to a chart of reversed star paths, and Shen Qingci's father, Shen Xuan, has been falsely accused of being the mastermind. To clear his name, the two investigate a haunted house at night, infiltrate the Bureau of Astronomy, and brave an underground palace in Zhongnan Mountain, gradually uncovering the secrets of the Four Symbols Reversed-Path Array, the Nine Hells Altar, and a royal blood sacrifice.

As their investigation deepens, they discover that the murders conceal the Nine Hells Demon Lord, sealed away for a thousand years, and a fateful legend about the Star Soul and Sword Spirit. Shen Qingci and Li Jingyan turn out to be reincarnations of a celestial official and a general from a thousand years ago, charged with suppressing the demon. Meanwhile, Yang Guozhong, the Crown Prince, and forces of the Zoroastrian faith secretly conspire to awaken the Demon Lord on the day Mars guards the Heart constellation, intending to control the world with an immortality ritual.

Amid relentless pursuit and disturbances in the earth's ley lines, the two awaken the power of the Star Soul and Sword Spirit and thwart the blood sacrifice, only to discover that the seal's story is not over. Figures corresponding to them appear in the future, hinting that the cycle of reincarnation continues. The fog over Chang'an has yet to lift, fate spans a thousand years, and a new storm is brewing.