Regina Blake is reunited with her mother at last, but it may be too late to save either of them. Amid the glories of Hapsburg Vienna, the two women are subject to the wiles of the Tremere warlocks with only the vampires Victoria Ash and Beckett as dubious allies. A return to London only makes matters worse, as an undead prince dips into madness and threatens to take the Empire with him Can Regina hope even to survive, much less prevail?