The authentic narrative of a decades-long conflict between the Los Angeles Police Department, under the determined leadership of Police Chief William Parker, and ruthless criminal elements directed by Mickey Cohen, also a one time boxer who rose to the very surface of L.A.'s criminal environment. The series is a crime drama set through the 1940s and'50s in Los Angeles. It's really a world of glamorous movie stars, powerful studio thoughts, coming war heroes, a more robust and corrupt police and an even more dangerous unlawful network determined to make L.A. its West Coast base.