Nils is a lazy boy who loves to cause mischief and bully animals, but it catches up to him when he angers a tiny tomte who shrinks him down to tomte size.

The flock invites Morten to join them, but hesitate when Nils admits he's human; later, a hungry fox decides on a goose for dinner.

The geese still don't know whether to bring Nils along; while flying with Morten, Nils' hamster Carrot hears a voice shouting for help.