밤을 걷는 선비밤을 걷는 선비

Set in an alternate Joseon dynasty. Jo Yang-sun is the daughter of a nobleman whose family loses everything when her father is framed for treason. To make ends meet, Yang-sun begins cross-dressing as a male bookseller, and meets the handsome and mysterious scholar Kim Sung-yeol, who works at the Hongmungwan. Sung-yeol is a vampire, and he continues to be haunted by the long-ago death of his first love Lee Myung-hee, especially when he meets Myung-hee's present-day doppelgänger Choe Hye-ryung, an aloof nobleman's daughter. Meanwhile, the evil vampire, Gwi, resides in the royal palace and uses his powers and political machinations to prevent the Crown Prince from ascending to the throne.