It’s 20,000 years ago and there’s a bit of a nip in the air as the Ice Age kicks off. Manfred the well-meaning mammoth, Sid the fast-talking sloth and Diego the duplicitous sabre-tooth tiger form a reluctant and unlikely alliance when they come across a helpless human baby. As they try to return the tot to his migrating tribe, the trio must battle more than just the elements in this harsh world of predators and prey.