Set during the Ice Age, three animals (Sid the sloth, Manny a woolly mammoth and a saber-toothed tiger named Diego) find a little child lost from his family, and decide to return him to his father in a journey full of danger.
The animation revolves around Manny the mammoth, Sid the sloth, Diego the tiger and Scrat the miserable squirrel when they discover that the ice age is coming to an end due to melting ice. Creatures begin a survival journey to elelvated grounds which leads to a thrilling adventure.
As Manny battles anxiety over his impending fatherhood, Sid gets baby fever and decides to start a family of his own by stealing some dinosaur eggs. When the furious dinosaur mother retaliates by kidnapping Sid, Manny and Diego must go to rescue.
Mani, Sid and Diego, the three friends return for a new adventure in a confrontation with the largest group of environmental challenges facing the entire continent, in which they face bizarre marine creatures, unravel the curtains on a new world, and clash with the sea pirates.
During his never-ending pursuit of his acorn, Scrat inadvertently sets a meteorite on a collision course with Earth. With the entire planet at risk, the herd must wander out of the place they call home to find a safe place.