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.
Sam is a professional boxer about to get released from prison. While on parole, his past catches up with him and he has no choice but to flee. Five years later, he has rebuilt a simple life on an exotic island in Thailand with his wife and her daughter, but when he gets blackmailed by a dangerous local godfather, he must embark on a dangerous drug smuggling mission which results in a tragedy. Now he has only one purpose: to seek merciless vengeance.
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.