The adventures of Frank and Buster, two intrepid young koalas who fly around the Australian outback in their yellow plane, on a special mission to help other creatures in need. Ned writes a letter to his favourite auntie with news of all the things he's been up to - but can't decide which things to include. Frank and Buster remind Ned of the important things that have happened. Ned realises that it's fun to keep in touch with people.