Danielle has been part of top secret Project Immortalis long enough to know questions get you killed. The underground military complex she works at? Doesn't exist. The source of her salary? Untraceable. All she knows is that she's about to test the most radical theory ever developed. When the center finally catches a living, centuries-old vampire, they come one step closer to creating the ultimate weapon. For even if the vessel is irrelevant, his immortal blood holds the key. To Danielle though, he quickly becomes a problem. It's not that she doesn't believe in vampires. She does. No, Danielle's problem is that whenever she's in contact with this particular vampire, blood leaves her brain to fuel other parts better left dormant.

For the past several centuries, Bjorn has hunted, prowled and waged wars. His motto is simple—bite, feed, let the carcass roll. After he's ambushed like an animal and sedated he awakens at the heart of a military machine spinning out of control. And with them is the most enticing woman he's ever seen. Her mind is like a diamond, clear and hard, and he knows it could cut through anything. Even his legendary cool.