Whitey Bulger grew up with his buddy John Connolly on the streets of Boston and soon came in conflict with the law. , In the 1970s, is one of the city’s most influential mobster Whitey decades later. His old friend John but is on the other side of the law and working for the FBI. Whitey offers a deal: he will provide the FBI with information from the Boston underworld and must not expect that tracking.
This means for Whitey, he can kill two birds with one stone: he himself can freely build his business and deliver its competitors to the FBI. The system seems to be perfect, but soon both sides lose control, and the deal between the State and the underworld is at risk.