In the Nevada desert, a handful of scientists are battling to retrieve a swarm of rogue micro-robots that has escaped from the lab. The swarm is self-sustaining, self-reproducing and capable of learning from experience. It is, to all intents and purposes, alive. And very, very deadly. Because it has been programmed as a ruthless predator, a predator that becomes more dangerous with every passing hour....And we are the PREY

Was it murder? Was it horribly botched surgery, an accidental malpractice? Was someone in the great Boston medical centre violating the Hippocratic Oath? Only one doctor is willing to push his way through the mysterious maze of hidden medical data and shocking secrets to learn the truth.