Contrary to what we know, there are four realms in this world.
Human world, heaven world, underworld.
There is also the origin of the three realms, the fourth realm known as the realm of origin.
Each realm has a guardian, the king of the realm.
The king of the realm of origin, Huang Yan, died mysteriously. As the deputy guardian, Mu Hua followed him to the human world and began to search for Huang Yan's reincarnation.
After seven hundred years apart, can we still see each other?