Ragnarok happened. Survivors converged on earth many millennia ago, breeding and blending with humans. Now, a secret battle of bloodlines is being waged in the shadows of the real world. Raine Thoren became a Shadow Guardian to protect non-magical humans from threats they aren't even aware of. But the latest killer on the loose has stealth and power unlike any adversary she's faced. She won't be able to bring this one down alone. FBI...