The events take place 20 thousand years ago. Wild animals were just trying to survive in these circumstances, and did not think at all what awaits them in the near future. But suddenly there was an apocalypse associated with the onset of cold weather. The ice Age will not allow these creatures to survive if they do not hurry to warmer climes. Among them is the mammoth Manfred, who does not want to join other animals. Sid the sloth joined him. The latter, in turn, simply overslept the relatives' hike, and they did not want to wake him up, because they were insanely tired of spending time with him.

Joining forces, deciding to move on their own in order to survive, they suddenly find themselves in an awkward situation. And they find a human cub. It turned out that after the attack on the tribe by wild tigers, the baby was trapped. Mom did everything possible to save him. And now the mammoth is obliged to find people who have set out on a journey without a child. But the predators will not give up their achievement, they want to take away a person from this couple. Diego, the saber-toothed tiger, advanced to the task. Having gained the confidence of the characters, he must accompany them in order to steal the baby at some point and take him to his leader.