Don Roberto Luciano, the head of the Sicilian mafia, agrees to act as a witness for the prosecution in the trial of Paul Carolla, who brutally murdered the don's son twenty years ago. But almost on the eve of the trial, all the men in the Luciano family are killed. Roberto's wife, who suddenly became a widow, her two daughters-in-law and granddaughter take the reins of power into their own hands and declare a vendetta on their enemies. Now they are the bella mafia, the beautiful mafia, and woe to anyone who stands in their way.