The demon-born seeds of this world will be retrieved. Everything is for the sake of the Goryo Shinju.

The "spirit world" where evil spirits of rivers and mountains live.
The "present world" where humans live.
And the "empty world" at the bottom of the earth: .......

The "empty world" is a cesspool of "dirt" that flows out of the present world.
Once upon a time, there was a sacred tree called "Goryojinju" in the land of the Yūrei.
It was in charge of guarding the entrance to the false world.
One day, it became very ill and a large amount of impurities overflowed into the world of the dead.
The god of protection lamented it so much that he blocked the entrance to the false world with his own life.
The stains were scattered into the present world as "demon-born seeds."

In order to return the demon seed to the sacred tree, a Chinese medicine doctor's journey begins.

Translated with www.DeepL.com/Translator (free version)