Scott Calvin is about to turn 65. Realizing that he can't be Santa forever, he sets out to find a suitable replacement Santa while preparing his family for a new life adventure south of the North Pole.
In a future, post-apocalyptic Los Angeles brought about by nuclear decimation, citizens must live in underground bunkers to protect themselves from radiation, mutants and bandits.
An anonymous young man unleashes a campaign of vengeance against the corrupt leaders who murdered his mother and continue to systematically victimize the poor and powerless.