在一望无际蔚蓝深邃的大海上,松鼠斯克莱特(Scrat)正趴在浮冰上漫无边际地漂流。突然,他看到不远处矗立在大海中央的椰子树,他欣喜过往,奋力向小岛游去。好不容易游到了岛上,结果树旁边的白骨却吓得他魂飞魄散。他稍稍定下神来,偶然瞥见与沙滩接壤的海水底层有一枚坚果。为了坚果命都可以不要的斯克莱特一阵狂喜,竟然抱着巨石跳入海中。可是来到跟前却发现,那只是一枚坚果的外壳。他将壳翻了过来,意外发现壳的内部刻着金银宝藏的路线图。 福兮祸兮?斯克莱特还来不及思索时,意外突然降临……Scrat is still floating on his ice float when he spots an island. He rows to the island and takes a rest at the bottom of a coconut tree. Scrat sees the skeleton of another Scrat. He is scared and then hides. Later, he investigates the skeleton. He follows the Scrat's arm and sees an acorn very deep under water. Scrat then comes up with a plan. The plan being to jump into the water while holding a rock to make him heavy enough to sink quickly. On the way down, he lost his nose and his body becomes very thin due to the crushing pressure. He picks up the acorn and realizes it's only half an acorn. He sees the back of the acorn, which has a picture of map to the giant acorn. He runs out of oxygen and starts to float downwards. Suddenly a marlin skeleton got the acorn map. Scrat is pulled by it and crashes into seaweeds, a salmon and a crab.