The plot is divided into two eras, the modern era and the Heian Era. Under the blessing of an entity known as Karura, twin sisters Maiko and Shouko investigate supernatural cases and fight against ghosts and demons using the powers of the Holy Book and the Earth Book. They usually receive help from their known colleagues, such as exorcist Yami no Shiguruto.

Collection of the author's best works.

In the *Iguchi Kiyomitsu no Shinrei Jikenbo* series: V.1 - *Dougyousha* V.2 - *Kitsune Tsuki* V.3 - *Boseki* V.4 - *Ogamiya* V.5 - *Tochi no Kioku no Rensa*