In this intriguing novel, a reclusive writer and a skeptical private investigator delve into a perplexing mystery involving a missing woman and her newborn child, set against the backdrop of post-war Japan. The narrative weaves together elements of folklore, particularly the legend of the ubume, a ghostly figure said to haunt those who die in childbirth, with a gripping detective story. As the protagonists navigate through layers of superstition and reality, they uncover unsettling truths that challenge their understanding of the natural and supernatural, ultimately leading to a profound exploration of human fear and belief.