Alex Williams has battled demons all her life. Now Lilith, the mother of all demonkind, has declared war on the human race. To defeat the immortal succubus Alex must lay aside her hatred and work with two half-demons, brothers Colwyn and Jacob Planter. Alex and Colwyn are prepared to destroy each other at the first sign of treachery. What they don't expect is the passion that overcomes them. To defeat Lilith, Alex must embrace what she believes profane. She must put her life in the hands of the half-demon who might turn against her at any moment.