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A woman is found murdered in a closed amusement park. A young couple who happen to be there at the same time become, without their knowledge, suspects for the murder. They are chased by a large number of police but only Martin Beck believes them to be innocent.
Martin Beck
Lennart Kollberg
Gunvald Larsson
Kasper
Mårds kvinna
Herrgott Nöjd
Kia
Kapten Mård
Greta Hjelm
Kaj Sundström
Eva
Cecilia Sundström
Police 1
Ulla
Kia (voice) (uncredited)
Cottage owner (uncredited)
Hector
Gunnar Danielsson
Stig Åke Malm
Sigbrit Mård
