The German vampire Gunther von Wittersheim has a problem: he’s fallen in love with a mortal, Lady Marguerite Giffard. His greatest immortal enemy, Comte Alphonse de Brunel, knows, captures Marguerite and turns her into a vampire. Gunther must put aside his desire for revenge and help his beloved through the painful transition to immortality.
Vampires are bound by the Covenants, a code of law enforced by the mysterious Conclave of Elders. If Gunther kills his enemy, the Conclave will destroy him. The couple is ordered to bring de Brunel alive to the Conclave to answer for his crimes. Gunther and Marguerite pursue their foe to St. Petersburg, where they are caught up in a revolution that pits vampire against vampire. Can they find a way to capture Alphonse de Brunel before the violence in Russia erupts? Or will they and their love fall prey to the breaking of the Covenants?