Li Tiansheng from Xiangzhou County, Guangxi, is a barefoot doctor respected by everyone in the village. His medicine box contains herbs and also hides secrets that no one knows.
When he was twenty-three years old, he suddenly fainted when he was in the rice field. When he opened his eyes again, he had a cold copper hammer in his hand, and someone said in his ear: "It's time to return to the team."
From then on, during the day, he saved lives and healed the wounded, and the needles and herbs warmed the world; at night or when working in the fields, under an invisible order, he fell to the ground and fell asleep - becoming the underworld of the King of Hell, holding the book of life and death to seduce souls, and traveling in the underworld flying boat between yin and yang.
To seduce the soul, you have to hit the golden hammer, and you will be punished if you encounter "hard work" with strong yang energy. Even the soul of your biological father and father-in-law was transformed into an animal by the King of Hell for him to attack. He watched the strong man being pushed into the river at the end of his life, and the names on the book of life and death overlapped with those of acquaintances. The medicine box and copper hammer in his hands were so hot that his heart burned.
A living person has been a ghost for forty years, and he has long been unable to tell whether he is a Tiansheng who has returned to the human world, or a "night returner" who has returned to the underworld.