Chen Guisheng came with a debt.
In 1995, it was the 15th day of the seventh lunar month, the Hungry Ghost Festival, Zishi. His mother gave birth to a child in an old house in a deserted village for three days and three nights, and took her last breath at the moment when his cries rang out.
People in the village said that he was a "child born in the yin" - the night when the gates of hell opened, his mother died with resentment, and the child he gave birth to was born half yin and half yang and would not live long.
Eighteen years later, Chen Gui worked as an undertaker in a funeral parlor, relying on his ability to "carry the dead" to make a living. He can see things that ordinary people can't see, and he can also get rid of those obsessions that don't want to leave. He thought that this would be it for the rest of his life - life was as long as he lived, and his life was in vain.
Until that rainy night, a woman knocked on his door.
"Chen Gui," she said, "your mother is not dead."
With one word, the lid of the coffin that he had been covering for eighteen years opened a crack.
From that day on, Chen Gui discovered that he was not just a "Yin-born son". Someone wrote his destiny twenty years ago, someone lives for him in the underworld, and there are still people - such as the woman named Su Qinghe in front of him - who insist on pulling him to uncover the truth that he dare not touch.
The horse fairy from the northeast, the corpse exorcists from western Hunan, the successors of Luban Shu, the Feng Shui surveying family... All the forces appear on the scene. Some people are waiting for him to die, some are waiting for him to live, and some are waiting for him to return.
And Chen Gui just wanted to know: Who was the woman who gave birth to him and died in front of him?
The debt between Yin and Yang must eventually be repaid by someone.