During the Zhenyuan era, the accidental death of the Bai Ze goddess, who governed the realms of humans and demons, causes the disappearance of the Bai Ze Order, leading to chaos from rampant demon beasts. In response, the demon leader, Zhu Yan, disguised as Zhao Yuan Zhou, volunteers to help form a demon-hunting bureau.

Wen Xiao, suspicious of Zhao Yuan Zhou, joins the bureau alongside her childhood friend Zhuo Yi Chen, a skilled detective and swordsman, the aloof archer Pei Si Jing, and the timid doctor Bai Jiu. Together, they confront demon beasts from "The Classic of Mountains and Seas" and uncover the truth behind their violent actions. As they face great responsibility and personal loss, will their friendship and the love between the top demon beast and the goddess overcome the challenges they face?

(Source: MyDramaList)

~~ Adapted from the classic text and the mythology and geography collection "Classic of Mountains and Seas" (山海经).