For most of her life, Allison and her brother Will protected the secret of their coven's celestial bloodline with the help of their caretaker Elijah, an angel to whom they were entrusted. But when the secret is leaked and Allison and Will are captured, she discovers her blood has made her a part of a much larger demonic war.
After months of brutal torture and experimentation at the hands of demons and their vampire latchkeys, Allison is left shattered and alone.When she is finally rescued by two unlikely allies, fellow tracers Sebastian and Skyler, Allison finds herself torn between her drive for vengeance and the quest to stop the war. Will she be consumed by her past, or will she find the strength to join Sebastian and Skyler in saving humanity?