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 Special Agent Will Decker prefers to work by himself. When a mysterious woman saves his life, she's suddenly assigned to work with him in his quest to track an elusive killer. The more he learns about his new partner, Raine, and what demons lurk in shadows, the more fantasy becomes reality. If they're going to stop the demon and unravel prophecies of the future, they'll need to work as a team and unlock each others' hearts and untapped powers.