When Scrat’s acorn sends an asteroid to Earth, the Herd must find a way to stop the asteroid from hitting Earth with the help of a returning friend.

Manny, Sid, and Diego discover that the ice age is coming to an end, and join everybody for a journey to higher ground. On the trip, they discover that Manny, in fact, is not the last of the woolly mammoths.

The story revolves around sub-zero heroes: a woolly mammoth, a saber-toothed tiger, a sloth and a prehistoric combination of a squirrel and rat, known as Scrat.