[Ancient words + group portraits + passion + unit story + youth growth + investigation]
During the period when humans and monsters coexist peacefully, spies occur frequently in the Nine Heavens and the Earth, including tears of mermaids, snakes carrying souls, ancient mirrors, and resentment...
The human princess Mu Qingwu founded the Jiuxiao Division, and traveled around Jiuxiao with the martial arts expert Yan Ci, the righteous Lu Guanzhi, and the superb medical Guan Yao, specializing in cases involving the human and demon tribes.
Under justice, justice is immortal. The four people went through mysterious cases and dangers, just to maintain the hard-won peace in the land of Jiuxiao.
