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.

Directed by: Hans Abramson
Written by: Hans Abramson
Runtime: 104 minutes
Cast:
Keve Hjelm Keve Hjelm
Martin Beck 
Hans Ernback Hans Ernback
Folke Bengtsson 
Tor Isedal Tor Isedal
Gunnar Ahlberg 
Gio Petré Gio Petré
Roseanna McGraw 
Kerstin Tidelius Kerstin Tidelius
Sonja Hansson 
Diane Varsi Diane Varsi
Mary Jane