Stop-frame animation. 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. Josie accidentally breaks Sammy's favourite mug. She considers hiding the pieces, but decides to own up to Frank and Buster. Everyone helps her create a wonderful new mug. Sammy is proud of Josie's honesty and very happy with his new mug.