[Machine Translation] Inspector Kazamatsuri is spending his vacation at "Urashima Honjin," a long-established inn in Ryugu Onsen, a secluded hot spring deep in the mountains. However, soon after his arrival, the dead body of the proprietress is discovered in the warehouse. The warehouse was a completely "locked room. What emerges from the investigation is the cursed history of the Anjo family, the family that originally ran the Urashima Honjin, and the legend of the "white curse" that has been passed down in the Anjo family for generations: anyone who attempts to steal the koban will be killed. The death of the proprietress, who left behind a huge inheritance and the question of her successor, leads to a series of murders. With the help of Mitsukawa, a mature maid who loves mysteries, Kazamatsuri's puzzling theories begin to lead him closer to the truth...? A novelization of the drama starring the popular character Inspector Kazamatsuri.