Moominfamily have befriended all the wild animals that Stinky let out of the zoo (except the crocodiles and who wants to be friends with a crocodile, anyway?) and when the zoo-keepers come to take the animals back, the Moomins, aided by the Inspector, fend them off. But, also, the hot spell doesn't last. Autumn comes, the jungle withers in the cold and the animals huddles, shivering, in front of open fires, wondering if chilly freedom is really better than a warm zoo.