The Octonauts are in Antarctica - the coldest place on Earth - and the Adelie penguin chicks have just hatched. While the Adelie penguin parents go hunting for food, Captain Barnacles, Kwazii and Peso are babysitting the chicks. With icebergs moving, strong storms blowing and a little penguin with a pirate heart that wants to help hunt, this is no ordinary Octonaut mission.