Cam and Sophie feel like they've been travelling forever to get to the rainforest and the river and their cousins. They just want to see a platypus, a egg laying mammal from Australia, in the wild, but with the rain tipping down and the river turning wild they can't see a thing. Until suddenly, they can. A platypus is just below them, and it needs help! But when their rescue attempt goes horribly wrong, it's not just the platypus that needs saving...