This is a story about a girl named Allie, a baby kangaroo named Marlu and a polar bear cub named Nanook. They meet on a tsunami wave after a volcano erupts. They come together to teach children of the world about climate change. What can we do to look after our planet? Allie, Marlu and Nanook are from different parts of the world, but it is changes to our planet that brings them together to 'Save the Earth ... because we have to'.