Stepping on the Yin and Yang Will Scare Hundreds of Ghosts

Demons and ghosts roam the night. My name is Li Jiu. There is a grave in the back hill of my house. It is said that my mother is buried inside. There is a smaller grave next to my mother's grave. I don't know who it belongs to, but every time I visit my mother's grave, my grandfather asks me to put incense on the small grave. I wonder who the grave belongs to, but my grandfather is unwilling to tell me every time, until one day... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.