Louie Cogburn had spent three days holed up in his apartment, staring at his screen. His pounding headache was unbearable – like spikes drilling into his brain. And it had been getting worse. Finally, when someone knocked at his door, Louie found a football bat, opened the entranceway, and began swinging…

The first cop around the scene fired his stunner twice and Louie passed away instantly. Detective Eve Dallas offers taken over the analysis, but there is nothing to explain the man’s unexpected rage or loss of life. The only clue is normally a bizarre message remaining on his screen: Overall Purity Achieved.

And when a second man dies under nearly identical situations, Dallas begins racking her human brain for answers and for courage to face the impossible…that this might be a computer virus able to spread from machine to man…