I keep thinking of you. I want to be with you but I can't. I want to be happy with you but I can't. Because, you will betray me like them. 

Luhan just wants to be alone, but Eun Seo wants to be his friend. He is a vampire... while she is a human. They go against all odds, and risk their lives, just to be together. Eun Seo isn't normal human though, because her blood, is unique, different, special. What exactly is she? What consequences will the vampire and human couple face?