In Salt Lake City, vampires are dying in droves — not by stake or silver, but from a mysterious infection spread by human carriers. When Cade and Father Vince are called to investigate, their search for answers leads them into a hidden vampire underworld of secret societies, decadent nightclubs where nothing is forbidden … and an ancient horror that knows exactly where to strike.

Deep within the city’s illicit nightlife waits the Sovereign — a creature of mist and shadow who can stop time, command death, and bend reality itself to his will. A creature that even the city’s oldest vampires fear.

As Cade and the Sovereign are drawn inexorably toward one another, old secrets surface, new alliances fracture, and Cade learns that this investigation holds an even more personal revelation for him. The secrets of his own heritage are about to drag him into a whole new darkness and bring him face-to-face with a horrific truth: that the monster he fears the most has been inside him all along.