A young American girl is found dead in Gota Kanal, Swedens largest channel. Since there are hardly any clues or evidence at all it seems as if the murder cant be solved. Martin Beck and his men are assigned to the case. Soon they find a likely suspect and together with a police woman they begin a cat and mouse game to catch him. Plot by Mattias Pettersson.

Gösta Ekman
as Martin Beck

Kjell Bergqvist
as Lennart Kollberg

Rolf Lassgård
as Gunvald Larsson

Niklas Hjulström
as Benny Skacke

Lena Nilsson
as Åsa Thorell

Ingvar Andersson
as Per Månsson

Bernt Ström
as Einar Rönn

Torgny Anderberg
as Evald Hammar

Jacob Nordenson
as Folke Bengtsson

Anita Ekström
as Inga Beck