Gabriel Conroy and wife Gretta attend an early January dinner with friends at the home of his spinster aunts, an evening which results in an epiphany for both of them.

Follows Michael Corleone, now in his 60s, as he seeks to free his family from crime and find a suitable successor to his empire.

Delusional and spoiled Maureen and her eccentric brother Howdy decide to track down and meet their estranged mother, all while the drama of dysfunctional relationships, disastrous weather conditions and a dark family secret ensue.