When Jo Yang Sun is driven out of house and home after her father is framed for a crime, she is forced to crossdress in order to make ends meet as a bookseller, where she meets Kim Sung Yeol, a handsome, but mysterious scholar who is actually a vampire. Meanwhile, an evil presence at the royal palace stops at nothing to keep the Crown Prince from claiming his rightful throne.

Seo-Ri’s mother Queen Sim was unable to have a child. She went to a shaman to help her have a child. With the help of shaman Hong-Joo’s black magic, Queen Sim was able to have a boy and girl twins. The girl, Seo-Ri, was put under a curse and abandoned deep in the mountains. She meets Heo Jun, a young man, there.