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.

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.

江湖游医叶平安因一起隐秘的旧日疑案寻至神都洛阳，因几桩诡谲离奇的出诊案件而背上巫医之名，她擅用心计，蛊惑人心，人人避之而不及。大理寺丞元少城因出身贱民区，被视作“臭老鼠”，纵有一身才能却无法得到尊重，他渴望权力，阴险狠戾，时刻捕捉着爬上高位的机会。
此时，洛阳城中发生一桩命案，一位大人惨死于家中，他不仅死前请叶平安来府上看过心疾，并且只有叶平安一人出现在命案现场。元少城负责此案，虽看出蹊跷，但为了利益仍将叶平安置于死地，以达成自己晋阶的“投名状”。
叶平安怎么看都只是这个凶杀案里的无辜替死鬼，然而事实真是这样么？
谁也想不到，叶平安已经在她的复仇之路上，下出了布局的第一颗棋。

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.