Twenty thousand years ago, the Earth is overrun by freezing temperatures in an Ice Age that is sending all manner of critters scattering in the path of encroaching glaciers. A human infant is discovered by an unlikely quartet of entirely different nature. Manny, a depressed woolly mammoth (Ray Romano); Sid, a fast-talking sloth (John Leguizamo); an acorn-crazed squirrel named Scrat (Wedge); and...

Twenty thousand years ago, the Earth is overrun by freezing temperatures in an Ice Age that is sending all manner of critters scattering in the path of encroaching glaciers. A human infant is discovered by an unlikely quartet of entirely different nature. Manny, a depressed woolly mammoth (Ray Romano); Sid, a fast-talking sloth (John Leguizamo); an acorn-crazed squirrel named Scrat (Wedge); and the devilish saber-toothed tiger named Diego (Denis Leary). They come together to help the child and hand him over to his mother. But for the accomplishment of the mission they face various problems. How do the four of them deal with the problems is interesting to watch.