The adventures of Frank and Buster, two intrepid koalas who fly around the Australian outback in their yellow plane, on a mission to help creatures in need. Lolly has made a new spinach-flavoured ice-cream for the townsfolk, but Ned doesn't like it. He agrees to be Lolly's taster and to help her find a new flavour, but her experiments fail and she feels sad. Frank has an idea - combine Buster's butter cookies and Lolly's ice cream. It makes a great new flavour.