The underworld is undergoing changes, Yin and Yang are in chaos, and evil and evil are brewing in the world.
City planner Chen Wen thought he would live an ordinary life, but because of a dream sent from the underworld by his great-grandfather, he was forced to be involved in this storm that swept both worlds. His respected great-grandfather, Mr. Yin and Yang, has his soul trapped in a mysterious evil formation deep in the underworld, and is in danger.
A dusty family manuscript gradually reveals that the underworld is undergoing a power change caused by grudges - a mysterious force that is dissatisfied with the old rules is setting off a huge wave, trying to reshape the structure of the underworld, and the delicate balance between the world and the underworld is also in danger.
Relying on the obscure clues left by his great-grandfather and an almost forgotten "half-joking" romance with a wandering master in his childhood, Chen Wen - a layman who knew almost nothing about Taoism - had to embark on a dangerous journey to find the truth and seek advice from his teacher. From the warnings and guidance from the clan members in southern Anhui to the exploration of the secret valley in Qingcheng Fairy Mountain in the middle of Sichuan, every step is full of unknowns and crises, and every clue points to a deeper mystery.
In this land of undercurrents, can he clear away the heavy fog, be guided by family ties and fate, rescue his great-grandfather, uncover the true source of the turmoil in the underworld, and find his own position and power in this great change? A battle between mortals and ghosts and gods, tradition and change is quietly unfolding...
