Mrs Grey is very worried. Again. Keith's hopping problems were fixed, but now she has much bigger worries that she doesn't believe even Big Red, Leader of all Kangaroos, can help with. 
There has been no rain for months and all the watering holes are dry. Terrifying winds have brought dust storms and bush fires.
But worst of all is what the humans have brought.
Then, one day, Keith wanders off alone and sees something he just CANNOT BELIEVE!