The Koala Brothers are Frank and Buster, two young koalas who left their home in the Australian bush and embarked on a special mission to the outback, where they set about helping others in need. They have a host of friends including Ned, Mitzi, Penny, Alice, George, Archie, Josie, Sammy and Lolly and often find themselves helping out with their problems. They love to have adventures, especially if it means getting in their yellow plane and flying around! When Sammy goes on holiday, Josie has to take over the shop. She gets in a muddle, trying to do everything just the way Sammy does it.