



عصر یخبندان در حال پایان یافتن است. سه قهرمان قسمت پیشین، سید، مانی و دیه گو، که متوجه خطر زیر آب رفتن منطقه زیست خود و در نتیجه نابودی حیوانات شده اند، تصمیم می گیرند تا قبل از آب شدن یخ ها خود را به منطقه ای امن برسانند. آنها در طول راه با الی، یک ماموت ماده- و دو همراه وی کرش و ادی برخورد می کنند و ...

Manny the woolly mammoth, Sid the sloth, Diego the saber-toothed tiger, and the hapless prehistoric squirrel/rat known as Scrat are still together and enjoying the perks of their now melting world. Manny may be ready to start a family, but nobody has seen another mammoth for a long time; Manny thinks he may be the last one. That is, until he miraculously finds Ellie, the only female mammoth left in the world. Their only problems: They can't stand each other--and Ellie somehow thinks she's a possum! Ellie comes with some excess baggage in the form of her two possum "brothers"-- Crash and Eddie, a couple of daredevil pranksters and cocky, loud-mouthed troublemakers. Manny, Sid and Diego quickly learn that the warming climate has one major drawback: A huge glacial dam holding off oceans of water is about to break, threatening the entire valley. The only chance of survival lies at the other end of the valley. So our three heroes, along with Ellie, Crash and Eddie, form the most unlikely