Animal Haven is a temporary home for all sorts of Australian wildlife, although there are a few permanent residents as well, like Oscar the owl, Fur Bag the possum, Cinnamon the koala and Alice the labrador. Meg and Mike live there, too, and they work so hard to help their parents rescue and look after the animals that the locals at Jeff's Creek have nicknamed them the Aussie Angels.
When that little Aussie devil Mark goes to a birthday party at a nearby farm, he is delighted to find that the family has a herd of goats. He falls in love with two energetic kids and names one Butter (because he has tiny bumps on his head where the horns are growing) and the other one Cup (because she has a cup-shaped patch on her back).
With Alice's help, he smuggles his new friends into Animal Haven, much to the disgust of Carol the camel. But how is he ever going to keep their presence a secret?