Kiera Vale has found herself drawn back into a web of occult sciences, mysterious dark entities, and government secrets -- woven by the agency known as A.R.C.A.N.E.. Kiera is happy to receive the call, but soon finds that things are not at all how she remembers them to be. What are these agents hiding, and why didn't they tell her the whole story? What is the true nature of the Blackwater Witch? Why is Dr. Thorn's young daughter locked up in a containment cell?