A young team of vampires -- Lee Kiseop, Shin Soohyun and Park Sang Hyun-- are known to have the highest record of killings because they are the guardians of Earth. But when they are assigned to protect humans, can they do it without having the carving of blood? Unfortunatly, fate isn't on their side this time. War is about to break out between vampires and humans. Forbidden love in also in risk when they fall in love with their humans. Can they keep earth and them safe?