Diego the sabre-toothed tiger, Manny the woolly mammoth, Sid the sloth and the prehistoric squirrel Scrat have survived the Ice Age. On the one hand, it’s cool that the ice desert has turned into a real water park. But on the other, rapid floods are approaching their native valley. Now the friends have to save the animals from the flood that is quite a difficult task, as they have no materials to build an ark. But don’t worry, the evacuation will be as successful and funny as their previous mission to return a human baby to its family.