Farmer's boy Nils is transformed into a miniature able to talk to animals. He befriends a goose named Martin and they embark on whimsical adventures together.

Nils is a normal farmers boy, until one day he is turned into a miniature boy. Now Nils is as small as the animals around him, he discovers he can talk to them. That's how he gets to know his new best friend: Martin the goose. Together they have the most amazing adventures.