There is a duck. It grows up.
Jokes aside, this is a sweet story of a filmmaker and his wife taking care of a newly born tufted duck in 1950s Sweden on one of the islands in the archipelago east out of Stockholm. As with most animal documentaries, it is uncertain whether all of the depicted events did happen as told in the story, nontheless the overall timeline of events is accurate. If you like cute animals doing their thing, then chances are you will like this.
Worth seeing also because of its historic significance: this is among the first productions on Swedish television. The downside is the black and white format, but the material is nonetheless easy to follow and to appreciate (and I'm saying this as someone who usually dislikes black and white TV).