As one of the genetically enhanced people known as Kyndred, Lilah has always been able to communicate with animals. Despite her precautions, she finds herself with the eye of GenHance upon her after a heroic animal rescue. The next thing she knows, she's chained up next to a half dead man in the back of a truck.

Walker finds himself brought back from the dead by an urge to protect the woman chained against him. Her warmth brings his heart back from death in more ways than one. Presumed dead from his deployment in Afghanistan, he's been bought as a test subject for GenHance's new soldier serum.

But just as Walker gains Lilah's trust, she finds herself hunted by the one group she never expected to fear... the Kyndred she's come to call family.