This is a gripping period piece murder mystery about shame, conscience, and the impossibility of justice. Won-kyu, an imperial investigator, arrives on the idyllic island of Donghwa in 1808 to look into a grisly murder series. The superstitious rural population believes a ghost is retaliating for a wrongful execution seven years ago. Inquisitor Won-kyu, on the other hand, believes the crimes have a more rational explanation.