When Scrat accidentally provokes a continental cataclysm with a storm, Manny is separated from Ellie and Peaches on an iceberg with Diego, Sid and Granny but he promises that he will find a way to return home. While crossing the ocean, they are captured by the cruel pirate Captain Gutt and his crew. However they escape and Manny plots a plan to steal Captain Gutt's ship and return to his homeland in a dangerous voyage through the sea. But the cruel pirates seek revenge against Manny and his family and friends.Manny, Diego, and Sid embark upon another adventure after their continent is set adrift. Using an iceberg as a ship, they encounter sea creatures and battle pirates as they explore a new world.