In the mid-nineteenth century, vampires gather at Castle Banat, one of their most sprawling and ancient warrens. Their five-hundred-year breeding project has produced the Golden, a mortal of perfect blood, and they've come to drink from her in a ceremony that will incidentally make her one of the Family. When the girl is found murdered, the clan’s shadowy patriarch calls on the detective Michel Beheim to solve the crime. But Michel has been a vampire for only a short while, and though he was a talented investigator among mortals, he is ill prepared for the task. Soon he is fighting to survive the bizarre terrors of the labyrinthine castle and the schemes of vampires who guard a secret that may forever alter the world of the undead.