Nora is 15 years old. Her parents died when she was young and now she lives with Anders and Karin and their son Dag. They move into an old apartment in an old house in Enköping. Behind a wall they find some old items from people who lived there a long time ago. They also discover that their apartment is haunted by a ghost. Together with Dag, Nora tries to find out more about the people who lived there.

It all takes place one summer at a music camp where the children crawl out of their tents every morning and gather for the day's rehearsals. Of course, there will be a concert eventually, but the road there is lined with both passions and complications. The horn player has lost his best mouthpiece and no one wants to help him look for it, except the conductor's 7-year-old son Franz. The conductor himself is constantly waving his baton, but life cannot be controlled by it. With unique animation techniques and specially composed music, the film takes us on an exciting journey among French horns and thistles.

The Beck group, with Alex Beijer as new group manager, is given a case where a 12-year-old girl found her mother dead below the stairs at home. Is it an accident or would someone have the single mother something bad? It turns out that the family lives with a protected identity and during the investigation, the case takes several surprising twists.