Alexandra Madison has discovered an invention that could change the world. When her partner is murdered and their lab destroyed, Alex knows she has to rebuild her prototype in time...

Donovan Shea knows the Madison project is of dire importance to the ongoing Pyr/Slayer war. So when he sees Alex being followed by a Slayer, he reacts and defends her, never imagining that she's his destined mate...

As Slayers close in on their prey, Donovan knows he'll surrender his life to protect Alex - and lose his heart to possess her...