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.
Kalle Blomkvist
Anders Bengtsson
Eva-Lotta Lisander
Sixten
Benka
Jonte
Uncle Einar
Constable Björk
Fredrik med foten
kriminalkommissarie Stenberg vid statspolisen
Tore Krok, alias Arthur Berg
Ingvar Redig, alias Tjommen
Mia Lisander
Kalle's father
Erik Lisander
Kalle's mother
vakthavande konstapel på polisstationen
hotellportiern
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