Inferal: Pure blood

After having their home ravaged by hellish, monstrous beings, Kira and Lucas must now do whatever they can to survive in a world that hunts their kind down and also keep themselves hidden from The Department of Supernatural Occurrences Investigations and Law Enforcement. But not all goes to plan.
After being discovered the siblings must now fight for survival and the only way of doing so is by working for the very organisation that wants to rid the world of their kind.
Not only that but they now have to work under the man who abandoned them and wants to have nothing to do with them, their own farther.
But there's more than meets the aye. There are many dangerous secrets about the siblings, their father and the organisation that the two have no clue about, not even the secret of the blood that runs through their veins. The secret of being a pure blood