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.
There's trouble in school when the Angels get a new principal and a new teacher. And it seems that suddenly Greash and Foxie are the teacher's pets. Pests, more like it. Sneaky deeds with Feral the ferret get the twins busted, but wombats are involved in the situation too, and Mike and Meg need to find out how. Whatever the answer, you can bet Greash and Foxie are up to no good.