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]

打從開天辟地時(shí)起，劍齒松鼠斯加特對(duì)橡樹果的追求就從未停歇；然而這一次，它那遭到詛咒的橡樹果引起了全球性的大災(zāi)變。整個(gè)地球四分五裂，板塊開始漂移，猛犸象曼尼、樹懶希德和劍齒虎蒂亞戈這三個(gè)好朋友從此展開了最最驚心動(dòng)魄的冒險(xiǎn)。在這場(chǎng)劇變中，希德與脾氣古怪的奶奶重逢；他們的小團(tuán)體遭遇了海盜的襲擊，這群烏合之眾試圖阻止曼尼一伙回家的旅程。