A psychotic loner (Richard Basehart) uses his genius for electronics to commit robberies while evading the police. When he escalates to cop killer, L.A.’s finest (Scott Brady, Roy Roberts and Jack Webb) employ new-for-the-time crime-fighting techniques to trap their clever adversary. The manhunt leads through - and beneath - Los Angeles’ most noir-stained cityscapes, stunningly photographed by the greatest of all noir cinematographers, John Alton. Featuring uncredited directorial assistance from Anthony Mann (RAW DEAL, T-MEN).