1611- England
Across Europe, Witchcraft was believed to be a contract signed with Satan to acquire supernatural sort of powers. In an attempt to cleanse England of all such people organized witch-hunts were due. Innocent people were accused with even the smallest hint that could be associated with witchcraft. Heretics, people with different religions, even redheads were considered to be the source of all evil. The King and church supported such actions since the 15th century and rewarded people for the persecution and victorious eliminations of such wanted people.
There were people who believed in witchcraft although they have never seen it. Others believed it to be a superstition, for all they knew it might have never existed. But people still hunted men and women of the sort like animals, be it for the money or for a completely foolish, fanatic mission on wiping the earth's face off their presence.
Vampires and werewolves were not known to mankind at that time, for they knew how to hide well. They knew how important it was for them to remain hidden. If word came to humans that such creatures did exist not even their powers would save them. What is unnatural to them remains the work of Satan and such practices must be eliminated.
Therefore, after a long time of vampires spread around the world, enjoying immortality in their own way, seized. And so it was that Uther Pendragon, High Leader and Eldest vampire known, brought order to their community, for it was he that started it in the first place. Covens were created and leaders were appointed to them, to keep them safe and in order. The few humans that were allowed to stay with them were forbidden to leave. The only way it could happen was under only extreme circumstances.
England's biggest coven was located in the outline borders of London and it was ruled by Uther's son by blood and protégée, Arthur. In the Castle of the Pendragons, they remained hidden and waited until this danger would wear off and the world would be safe once more.
Unfortunately, those who weren't vampires were still in danger...
A/N- There is going to be violence at some point in this story, so if you are not up for it this is a warning.