One of the better documentary style noir thrillers that was popular in post World War II Hollywood. Reed Hadley gives a neat deep voiced narration, souding like some sort of law enforcement officer, but it's a bit much at times. Dennis O'Keefe stars as a federal agent disguised as a small time hood. His target- to nab counterfeiters. Anthony Mann keeps the story fascinating, as O'Keefe dives deeper and deeper into the underworld. The real star here is John Alton's superb black and white cinematography, using harsh, minimal light, he creates a world that just peeks out of pools of black.