Set in Joseon in the year 1795, nobleman, inventor and master sleuth Kim Min and his sidekick Seo-pil investigate a silver counterfeiting ring, which may be linked to the disappearance of hundreds of girls.
Detective Kim Min and Seo-pil team up with a beautiful woman who has amnesia, and they discover vampire bite marks on bodies. As they investigate further, they begin to realize that the woman is somehow closely connected to the deaths.