A vampire scholar and a bookseller come together to fight against a conspiracy
An authority figure Gwee who controls the Joseon dynasty behind the scene is actually a vampire. Motivated by his avarice, Gwee conspires to obstruct the crown prince’s accession to the throne.
On the other hand, there’s a righteous vampire named Seongyeol who has been living as scholar for 150 years. He has locked himself in his studies for many years, and there are rumors amongst the villagers that he’s just an old man with leprosy.
In order to hide his true identity, Seongyeol never lets a bookseller revisit his place. But he makes an exception to the rule for a smart and decisive bookseller Yangsun. Yangsun knows the bad effects of corrupt political powers from the experience of losing her parents and three older brothers in a political trap. She believes that the world can become a better place if we broaden our knowledge through books. Because she lives in a society that forbids women from working in the business, she works and dresses as a boy. But Seongyeol instantly recognizes that she’s indeed a woman, and can’t help himself from being attracted to her.
Meanwhile, the villagers are becoming paranoid about a recent mystery murder. The authorities first believe that the death was caused by a tiger’s attack, and summon hunters for their expert advice. The hunters believe that the attacks were not made by a tiger. The first one to recognize it as a work of a vampire is the tiger hunter Hoyeon. As the vampire Gwee makes efforts to hide the crime, Hoyeon is falling into danger.
Seongyeol and Yangsun work together to fight against the vampire Gwee’s conspiracy.