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. It is a really hot day and Ned sees Sammy stocking up his shop with sun protection items. But when he hears Sammy talk about the harmful rays, Ned gets the wrong end of the stick and thinks the outback is being invaded. He sets out to warn everybody, but gets sunstroke in the process. Luckily the Koalas are on hand.