He's not a robot. He's not a human. He's both.

Sam Garrick, changed against his will into a super soldier by nanotechnology, is driven to protect humanity from the evil intent of his enemies. But the deadly focus he was wired for comes to a crashing halt when he sees her, a female who ignites in him a very human hunger, one he no longer thought himself capable of feeling.

Summer Coltrane is oblivious to the powers swirling around her—light and dark, evil and good—until the veil between both worlds is ripped open and she's plunged into a terrible power play between a darkly tempting warrior and his ruthless enemies.

To stay alive, she must join forces with Sam, a man who kills without remorse to save those he loves in a war no one in her world can know about.