Shen Huaisu, the three-hundred-year-old soul of the mass grave, was bound by a ghost marriage contract and married to Xiao Yanchen, the most cold-blooded evil prince in the capital. He investigates human mysteries, while she investigates injustices committed three hundred years ago. There is tit-for-tat confrontation during the day, and undercurrents surge at night. When the truth is revealed, the evil spirit has a weakness and the resentful ghost appears in the world.
