Sabre-toothed squirrel Scrat's nutty pursuit of the cursed acorn that he has been after since the dawn of time, has world-changing consequences - a continental cataclysm that triggers the greatest adventure of all for woolly mammoth Manny, smilodon Diego and sloth Sid. In the wake of these upheavals, Sid reunites with his cantankerous granny, and the herd encounters a ragtag menagerie of seafaring pirates determined to stop them from returning home.
Rated PG by the Motion Picture Association of America for mild rude humor and action/peril.