In the midst of trying to legitimize his business dealings in 1979 New York and Italy, aging mafia don, Michael Corleone seeks forgiveness for his sins while taking a young protege under his wing.

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.