In California, odd things are happening to unemployed scientist Jack Forman. His children tell Jack that strange men have visited the house. And Julia, his wife, isn't helping - she acts, even looks, somehow different.
Deep in the Nevada desert, in the laboratory where Julia works, matters are out of control. A swarm of rogue microbots, designed to reproduce and learn, is developing with a frightening speed that has the scientists battling to contain it.
Only when Jack is called in to help does he discover the shocking truth - the microbots have been programmed to behave as predators.
And Man is the Prey...