The adventures of Frank and Buster, two intrepid young koalas on a mission to help other creatures in the Australian outback. Lolly, the ice cream vendor, comes to town. Everyone is very excited. As Lolly goes to serve out the ice cream, she realises that something's wrong - the ice cream is melting! The Koala Brothers fly in to help avert disaster. Frank takes the ice cream back to the homestead freezer, while Sammy helps repair the van.