An ancient evil. An unholy alliance. An eternal love. William Dark is a monster-a vampire who feeds on blood and fear. He is exactly what Savannah Daniels needs. A year ago, Savannah's twin brother and his wife were brutally murdered. Savannah swore a vow of vengeance against the man, the beast, that killed them. A beast that is now after her. And the only way to stop him is to give up her human life. Can she convince William Dark, the most dangerous vampire on the East Coast, to transform her? Savannah and William enter into an unholy alliance: he will change her and see that she receives her justice. In return, she must be his companion, his mate, for eternity. But Savannah soon realizes that there is more at stake than just her life. Because once she tastes William's kiss, she knows that she may be in jeopardy of losing her heart as well. Seduction has a dark power all its own. Should she trust a man who claims to have no soul?