"A riveting thriller that will have you hooked from the first page to the last." Peter Colt, Author of The Banker.

Justin, a newly trained doctor, encounters Sarah while trail running, treats her puncture wound, and drives her back to a secluded cabin.

Concerned by his enigmatic patient's refusal of hospital care, Justin runs a surreptitious blood test for tetanus antibodies, shocked to find nanobots instead of a normal immune system.

But when her blood sample falls into the wrong hands, Justin and Sarah flee from Washington, DC, to the Adirondack wilderness, desperate to evade a rapacious corporation and a lone assassin with a sinister agenda.

While Justin earns Sarah's trust and unravels her mysterious history, their relationship deepens, and the dangers intensify.

As they discover why Sarah was chosen to host the nanobots and contemplate the consequences of her condition, Justin and Sarah hope to survive long enough for her life to be used as a force for good rather than ill.

Recommended for fans of Dean Koontz, Blake Crouch, and Michael Crichton.