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.

• SF Studios
• SVT Drama
• Gösta Ekman
• Kjell Bergqvist
• Rolf Lassgård
• Johan Widerberg
• Marie-Thérèse Sarrazin
• Tomas Norström
• Anica Dobra
• Heinz Hoenig