Now firm friends, mammoth "Manny", sloth "Sid", sabre-toothed "Diego" and mongrelly "Scrat" discover that their carefree days amidst the snow and ice are numbered... Things are getting distinctly slushy and they conclude that higher ground is a good bet before they find themselves needing galoshes. Their trek to dryness offers "Manny" a long-awaited opportunity when he meets "Ellie" - a girl mammoth who takes an instant dislike to him, indeed for some reason she thinks he's a possum! Clearly not the sharpest tusk in the drawer, but off we now go on a cheerful if predictable series of animated ...