Even Darker

How do we know what is good and what is evil? What if, in the eternal war between these two factions, a young angel once chose a side, the wrong one, and fell? Now, she's trapped on Earth, trying to live a normal human life as a Wraith, but her career path as an assassin isn't exactly the low-key occupation to keep her off the Guardian's radar. So, after centuries of living quietly, finally they catch up with her, and in the scuffle she is thrown together with a young Guardian who has his own secrets.