Life has been tough for you as a half vampire. First, your human mother and vampire male caretaker are killed when you're still fairly young. But it brings you closer to the human sisters Valentine and Camilla who have been your friends since you learned how to walk. Especially with the two girls losing their own mother not long after yours.
And there's also the full vampires Aditi and Najah that you're just as close with, with you having the same vampire male caretaker as them, though you obviously have different mothers with yours being human. And being full vampires, they don't exactly see eye to eye with your human best friends, but you try to keep the peace as much as possible.
Though that becomes a lot more difficult when vampires and humans alike suddenly start coming up dead. The very same way your mother and male caretaker died. Before you were young and weak, but now as a relations officer between vampires and humans, you will investigate who or what exactly is doing this and finally get your revenge.
Although the path to revenge may not be as simple as it seems