Two boys - John Connolly and James Whitley Bulger - grew up together on the streets of South Boston. Decades later, in the mid-1970s, they would meet again. By then, Connolly was a major figure in the FBI's Boston office and Whitley had become godfather of the Irish mob. Connolly had an idea, a scheme that might bring Bulger into the FBI fold and John Connolly into the Bureau's big leagues. But Bulger had other plans. Black Mass is the story of what happened beween them - a dark deal to trade secrets and take down Boston's Italian Mafia in exchange for immunity - that spiralled out of control, leading to murders, drug dealing and racketeering indictments. Ultimately, in what would become the biggest internal scandal in the history of the FBI, Bulger would find himself at the top of the FBI's Ten Most Wanted List.
