A mysterious curse is discovered in a certain area, and the scene is so gruesome it does not appear to be the work of any human. Called to investigate are the two members of the Kaikibu, the Mystery Solving Club: Ruri and Takao, a mismatched duo of unknown age. Rather than performing exorcisms, their role is to explain the strange phenomena. As they methodically untangle each curse, what emerges are the forgotten histories of the places involved and glimpses of human nature itself. The pair approach their work with a blend of severity and occasional empathy, uncovering the reasons behind each case. The narrative weaves light horror with detective work, exploring the boundaries between reason and madness, the nature of reality, and the human connections buried under supernatural events.