In cases ripped from the headlines, police investigate serious and often deadly crimes, weighing the evidence and questioning the suspects until someone is taken into custody. The district attorney's office then builds a case to convict the perpetrator by proving the person guilty beyond a reasonable doubt. Working together, these expert teams navigate all sides of the complex criminal justice system to make New York a safer place.

Jack Williams was the best friend of Vietnam veteran and detective Mike Hammer. When Jack is murdered, Mike makes it his business to solve the crime. He is helped by his secretary Velda, and partly helped, partly hindered by the Chief of Police, Pat Chambers. On the trail of the killer, Mike discovers government conspiracies, and plots used by the CIA and the Mafia.