Scholar Who Walks The Night - Joseon

Set in a fictional imperial dynasty, the story centers around the young daughter of a nobleman who loses everything when her father is framed for a crime. She starts crossdressing in order to sell books to make ends meet, and ends up meeting a handsome and mysterious vampire scholar. The mystery also includes an evil vampire residing in the palace who is the master puppeteer in the political arena, and will stop at nothing to prevent the Crown Prince from ascending the throne.

Set in an alternate Joseon dynasty, Jo Yang-sun (Lee Yu-bi) 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 (Lee Joon-gi), 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 (Kim So-eun), especially when he meets Myung-hee's present-day doppelgänger Choi Hye-ryung, an aloof nobleman's daughter. Meanwhile, the evil vampire, Gwi (Lee Soo-hyuk), resides in the royal palace and uses his powers and political machinations to prevent the Crown Prince (Shim Chang-min) from ascending to the throne.