Synopsis: Scrat's nutty pursuit of the cursed acorn, which he's been after since the dawn of time, has world-changing consequences -- a continental cataclysm that triggers the greatest adventure of all for Manny, Diego and 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. [Source: Sina.com]

打从开天辟地时起，剑齿松鼠斯加特对橡树果的追求就从未停歇；然而这一次，它那遭到诅咒的橡树果引起了全球性的大灾变。整个地球四分五裂，板块开始漂移，猛犸象曼尼、树懒希德和剑齿虎蒂亚戈这三个好朋友从此展开了最最惊心动魄的冒险。在这场剧变中，希德与脾气古怪的奶奶重逢；他们的小团体遭遇了海盗的袭击，这群乌合之众试图阻止曼尼一伙回家的旅程。