A computer program turns killer. A computer scientist develops a security tool called Walter (Warfare Algorithm Logical Token Encoder & Reprogramming Unit) that can find and follow a targeted person anywhere in the world, indoors or out, where there are security cameras on the ground or in the sky. But when human personalities, especially psychotic personalities, get involved in Walter's programming and application, murder and mayhem become common until not even buildings are left standing. [Warning, graphic sex and violence.]