Chicago February 14th 1929. Al Capone finally establishes himself as the city's boss of organised crime. In a north-side garage his hoods, dressed as policemen, surprise and mow down with machine-guns the key members of Bugs Moran's rival gang. The film traces the history of the incident, and the lives affected and in some cases ended by it.
Los Angeles Police Department detective Russell Poole has spent years trying to solve his biggest case -- the murders of The Notorious B.I.G. and Tupac Shakur -- but after two decades, the investigation remains open. Jack Jackson, a reporter desperate to save his reputation and career, is determined to find out why. In search of the truth, the two team up and unravel a growing web of institutional corruption and lies.