The world is about to be taken over by an ancient race bent on the destruction of all human life---only supernatural beings will be spared. Aeden and Lyall MacKay, vampire brothers, living in a world that now accepts vampires exist, find themselves leading the challenge to the Ancient's mad scheme. When the small town of Aberglen, Scotland, is threatened by marauding winged creatures, police inspector Alistair MacFarlane is more than keen to enlist the MacKay brothers' help.
Alistair has been in love with Aeden ever since their first meeting, but Aeden, despite his attraction to Alistair, is reluctant to take a mortal lover. Their lives are inescapably entwined when the threat of worldwide destruction becomes imminent and humans and vampires must fight alongside each other to overcome the Ancients' devastating Doomsday machine. Despite the danger that surrounds them, new relationships based on love and trust are forged. But is the combined force of mortal and immortal enough to defeat the seemingly unstoppable power of the Ancients and their bloodthirsty allies?