Heeseung is a vampire living in a human world. because his grandfather sent him there because he have to prevent a accident from happening and save a girl who can go back to time, she had a small clock mark on her wrist but she still don't know what's the meaning of it. so that he can turn back time and prevent another accident that made humans believe that vampires are evil and villains.

if he succeed vampires like him can live peacefully with humans and humans don't need to hunt vampires anymore..

one day, he feel so hopeless that he can't find her anymore, he then walked outside to have fresh air, while walking he saw a unconscious girl laying down in a dark alley, he bought her to a hospital and noticed a small clock mark on her wrist, his face lights up when he finally saw the girl he's looking for.