This is a true and contradictory story: about Whitey Bulger, the younger brother of a state senator, the most notorious and cruel criminal in South Boston history.He wandered between law and darkness and eventually chose to become an informant of the FBI to dismantle a mafia family that was invading his territory. This story not only depicts how a thug survives in the cracks between black and white, but also reveals the blurred boundary between family affection, loyalty and betrayal.