Chen Du, the heir of a funeral family, discovered that the "throat-locking saliva" had reappeared while handling the remains of a bizarre murder case. In order to protect his family, he violated the ancestral precepts and uncovered the secret of the "opening of the vagina", but was involved in a grudge that spanned thirty years. A "Book of Closed Doors" from the Republic of China guides him to pursue the truth, but his companions all have their own secrets. When the dusty "door" was loosened again, Chen Du found that he was not only facing a vicious ghost seeking his life, but also an abyss that could swallow reality. The story combines the weirdness of Chinese folklore, the unknown fear of Cthulhu and complex family feuds.
