In his quest to understand evil, Dr. Michael Stone travels across the United States to meet some of the country's most notorious killers in person. What emerges from these conversations is insight into the often disturbing world of the criminal mind. From the denials of a convicted child molester, to the frank admission of guilt of a man who claims to have killed as many as 70 people, a human voice emerges from the chaos and violence. To prevent violent crime, we must understand it, and this hour will bring it into sharp focus.