Ronia is a girl growing up among a clan of robbers living in a castle in the woodlands of early-Medieval Scandinavia.

Their castle, Matt's Fort, is split into two parts by a lightning bolt on the day of Ronia's birth.

The following winter is long and cold and although Matt's robbers are well fed, their counterparts are suffering on the other side of the chasm.

Ultimately their families repent of their feuding, and everyone is reunited, but the story concludes with both Ronia and Birk deciding that the robber's life is not for them.

It was directed by the Swedish film director Tage Danielsson and adapted for screenplay by Astrid Lindgren herself.

[citation needed] In 1991 the book was made into a Danish musical called Ronja Røverdatter.

The musical is written by Axel Bergstedt in the German language, and has orchestra, band and more than one hundred people on the stage.

A production of Ronja the Robber's Daughter interpreted by Ronny Danielsson performed at Stadsteatern Stockholm Sweden 2014, 2016, and 2018.