In a city, high up on the roof, just behind the chimney living someone extraordinary.
One day he visited the boy who lives next door. This is the beginning of a great friendship.

On the roof of one of the houses lived Karlsson Stockholm. He has an extraordinary ability - thanks to Śmigiel inserted on a back can fly. One day visit living in the same building, a seven-year boy. Svante, called by all the little brother, has a lot of older siblings and there is no one to play. Since that time Karlsson becomes his best friend. He spends time with him when he feels lonely. Karlsson is unique not only because of its Śmigiel. As he says, it is also the best expert on everything, and therefore also of adventure and mischief, which will be accompanied by little brother.
The film based on the book by Astrid Lindgren - Swedish author of children's literature, which created characters such as Pippi Longstocking, Nils Paluszek the Children of Noisy Village.