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's summer. Kalle, Eva-Lotta and Anders have formed a gang, the White Rose. They are in playful battle with Red Rose gang. A relative of Eva-Lotta's mother, Uncle Einar, come to visit and Kalle notice immediately that he is behaving strangely. Einar seems to have hidden something in a closed mine outside town. Two mysterious strangers appear.