In the continuing saga of the Corleone crime family, a young Vito Corleone grows up in Sicily and in 1910s New York. In the 1950s, Michael Corleone attempts to expand the family business into Las Vegas, Hollywood and Cuba.

Voting against the Mafia in what he thinks is a secret ballot costs Sicilian laborer Mimi his livelihood. He leaves his wife, flees to Turin and romances a Communist organizer - but he just can’t shake the Mafia. When they lure Mimi back to Sicily with a better job, he must keep his lover – and love child – under wraps. That’s when his wife announces she’s pregnant.