In a tale set in Japan's Meiji era of 1909, a fictional rendition of poet Takuboku Ishikawa and linguist Kyousuke Kindaichi, previously acquainted in reality, take the stage. Takuboku, running a detective agency to provide for his loved ones, embarks on a joint inquiry with Kyousuke into reported ghostly sightings at the renowned Asakusa Junikai structure, also dubbed Ryounkai.