Barnaby Jones was a retired private investigator, but quickly came out of retirement after his son Hal, who had taken over Barnaby's job, was murdered. Hal's widow, Betty, helped Barnaby try and find her husband's murderer. The murder was solved, but Barnaby decided he wanted to return to investigating full-time and Betty decided to join him.
Frank Cannon and Barnaby Jones investigates the rape and murder of a young woman who was about to blow the whistle on the company she was involved. But they are investigating for different clients and from totally different angles.
