Mystic Nine follows Zhang Qishan as he joins forces with Wu Laogou, alongside Huo Xiangu and the other members of the Mystic Nine, when turmoil returns to Changsha. The mysterious disappearance of Unit 401 uncovers a century-old secret. Faced with life-and-death choices, bound by brotherhood, responsibility to their sects, and devotion to their country, they risk everything to protect their home and overcome the crisis.

The Tang Dynasty's grandeur continues, but hidden dangers lurk beneath the prosperity, and a storm is brewing. Various forces are on the move, triggering frequent mysterious incidents among the common people. What kind of supernatural mysteries will Lu Lingfeng and Su Wuming encounter on their perilous journey? The road to the west is unpredictable.

In Chang'an City, a mysterious herb called Black Tea causes a stir, coinciding with a string of missing bride cases. General Lingfeng of the Jin Wu guards is tasked with uncovering the truth. Along the way, he encounters Su Wuming, a sharp detective and disciple of Di Renjie. Together, they unravel a web of supernatural mysteries and dark conspiracies threatening the city.