Brooding vampire halfling and biologist Bel Maras is determined to create a cure for the wasting disease that plagues his vampire family. His work becomes essential as the Hunters intensify their global and bloody campaign. When Bel's cure fails, only his ancient and estranged godmother Uta Ilirije can help. But seeing the ice-cold Uta reveals something shocking--she is his bonded mate. She may be a dangerous warrior, but Uta feels her failures acutely. She has been unable to protect her kind from Hunters, and vampires are dying out. Worse, she tied Bel to her long ago in an accident of blood, then abandoned him for his own good--a choice he has never forgiven. Many days, she is convinced Bel and the vampires would be better off if she just walked into the sun. Biology has fated them to be mates. Now these old enemies must overcome their past to save the vampires and come to peace with the bond they never chose.