Lin Mai moved into a century-old house in Xikou Village to write his thesis, but he didn't know that he had stepped into a death trap that had lasted for hundreds of years. The sound of scratching in the middle of the night, the bloody hands in the mirror, the call for help from the bottom of the well - trapped in the old house is Su Wan, a bride who was pushed down the well during the Republic of China. In order to save her, Lin Mai accidentally formed a "shadow marriage contract" with her blood, and was forced to start an absurd "living together" life with this female ghost.
However, the real price of the contract is "live and die together" - the day Su Wan's soul died was the day Lin Mai died. In order to survive, Lin Mai began to investigate the truth about Su Wan's death, but found that the entire mountain village was hiding a shocking secret: the dry well under the old house was a crack leading to the underworld, and the Zhang family had sacrificed women with "extremely yin bodies" to suppress it. And Su Wan was the fourth sacrifice.
What's even more frightening is that Lin Mai discovered that he didn't move in by chance - he had the blood of the Zhang family flowing in his blood, and he was the "sacrifice groom" chosen a hundred years ago. When the centuries-old corpse king underground wakes up, when Su Wan's other half turns into a ghost, and when the scavenger organization's ghost hunters come to the city, Lin Mai must make a choice within three months: let Su Wan's soul disappear forever and avoid future troubles, or risk his life to help her reverse the yin and yang?
And when he finally revealed Su Wan's true identity - the female ghost who had been trapped at the bottom of the well for hundreds of years and had a secret marriage with him was actually the great-grandmother he had never met - all ethics, emotions, life and death, all collapsed into irreparable despair in front of this man-eating old well.
