Times are changing for moody mammoth Manny, motor mouthed sloth Sid and crafty saber-toothed tiger Diego in this third installment of the beloved computer-animated children's franchise. Life heats up for our heroes when they meet some new and none-too-friendly neighbors: the mighty dinosaurs.
When Sid's attempt to adopt three dinosaur eggs gets him abducted by their real mother to an underground lost world, his friends attempt to rescue him.