Three men are found dead in the locked second-floor office of a Honolulu building, with no sign of struggle except for the ultrafine, razor-sharp cuts covering their bodies. The only clue left behind is a tiny bladed robot, nearly invisible to the human eye. In the lush forests of Oahu, groundbreaking technology has ushered in a revolutionary era of biological prospecting. Trillions of microorganisms, tens of thousands of bacteria species, are being...

In the Nevada desert, an experiment has gone horribly wrong. A cloud of nanoparticles--micro-robots--has escaped from the laboratory. This cloud is self-sustaining and self-reproducing. It is intelligent and learns from experience. For all practical purposes, it is alive. It has been programmed as a predator. It is evolving swiftly, becoming more deadly with each passing hour. Every attempt to destroy it has failed. And we are the prey.

Taking a year off from her medical studies and leaving New York City, Pia Grazdani accepts a job at Nanobots, a nanotechnology institute, where she is quickly warned not to investigate the other work done at the facility and not to ask questions about their source of funding.