1948 Danish film directed by Astrid Henning-Jensen and Bjarne Henning-Jensen

1953 film by Annelise Reenberg

1943 film by Bodil Ipsen

A woman is found strangled in her shop. Shortly after, another murder is committed. Perhaps the most terrifying is that the both girls' name is Sonja. The police is convinced it's the same killer and at each scene is heard a woman singing the same song. A song which is soon dubbed the 'murder melody.'

1954 film by Annelise Reenberg