The ice age on Earth is finally coming to an end! Facing the warming weather, the animals are all excited. In the spring weather, there are many kinds of food and life is carefree... However, our three heroes in the first episode, Diego (saber-toothed tiger), Manny (mammoth) and Sid (sloth), have sensed a crisis in the atmosphere of universal jubilation: as the earth gradually warms, the water level is slowly rising. At this rate, the homes of the animals will soon be submerged. So, under the leadership of Diego, Manny and Sid, the animals began their journey to find a new home. On the road, in addition to laughter, there are also many hardships. Can the animals finally overcome the difficulties and find a brand new world?