The vampire race is on the verge of extinction due to an ex hunter named Key. But once he met a young woman named Dara; he quit hunting and decided to live a normal life. Most of the vampires were angered, due to the lack of food and always having to go into hiding. So the clan broke up into the dark and light clan. The light clan is full of good vampires, while the dark clan is full of bad. Seunghyun is the leader of the light clan and realizes Key will have a son soon. He had forgiven Key for what he has done and is now going to try his hardest to protect that family from Seungri; a vampire that's part of the dark clan and wants to get revenge.