A man continues to throw rubbish into the forest, to the great annoyance of both the forest ranger and the forest animals, but when he refuses to stop, more drastic measures have to come into use – and this is where the forest ranger luckily gets the help of a dog, a cat and a mouse, who have had enough of the litter lout.

One spring morning, animals wake up from their winter sleep and find that their forest is taken over by people who have built a city there. They understand they need to find new survival strategies and learn to earn money.