A mentally unstable veteran works as a nighttime taxi driver in New York City, where the perceived decadence and sleaze fuels his urge for violent action.
The early life and career of Vito Corleone in 1920s New York City is portrayed, while his son, Michael, expands and tightens his grip on the family crime syndicate.
In New York City's Little Italy, a devoutly Catholic mobster must reconcile his desire for power, his feelings for his epileptic lover, and his devotion to his troublesome friend.