Unassuming high school girl Jan-di stands up to -- and eventually falls for -- a spoiled rich kid who belongs to the school's most powerful clique.

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.

In-Soo (Kang Ha-Neul) has a special gift to see ghosts and has become isolated from other students because of this. He transfers to a high school in a rural area outside of Seoul. There, In-Soo meets a female ghost (Kim So-Eun) at the high school and forms a friendship with her. Meanwhile, classmates disappear one by one.