1941 film by Alice O'Fredericks, Lau Lauritzen

1941 film by Jon Iversen and Alice O'Fredericks

1945 film by Lau Lauritzen, Alice O'Fredericks

1943 film by Bodil Ipsen

In broad daylight, a man runs at full speed across the Town Hall Square wearing a dress and white. People stare in amazement as he tries to grab a seat in a phone box to make a call. However, his story is even more incredible than they can imagine.

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.'