This drama tells the story of a vampire, Park Ji-sang who works as a doctor in a hospital. Yoo Ri-ta is a hotshot heiress doctor, a star physician at the hospital and the niece of the board’s chairman. She’s snooty and cold, but highly capable, and accustomed to being the golden girl. Lee Jae-wook is their chief, an outwardly gentle, inwardly ambitious man who will prove to be their biggest adversary.

Seo Yi-Kyung ambitiously wants to build her own empire. She is calm and also passionate. She doesn’t believe greed is a sin. Park Gun-Woo possesses good looks and comes from a wealthy family that runs a large company. Seo Yi-Kyung is his first love and he is still in love with her. Lee Se-Jin comes from a poor background. She desperately wants to escape from her situation.