The once star profiler for the FBI, Doug ONeal, who has been able to capture the greatest of serial killers, rapists, and criminals, comes back to San Francisco to find the worst of them. Because of this killer's background, the FBI has never even known he existed. Doug has only suspected that he exists.

The FBI puts together a task force with the San Francisco police, Anne Borges, and Jeff Shinn to hunt down this suspect to prevent any more deaths. The police are always looking for the suspect