Frederik Larsen (Lau Lauritzen Jr.), a sailor and has sailed since he was 15. Now he has lost the desire for a sailor life, especially after his best friend Bob was lost in a hurricane. When his ship docks at Copenhagen, shortly before Christmas, he signs off with all his hire on the pocket. He seeks accommodations in sailor home Bertel, located on the nice side of Nyhavn. Here he can stay and eat for very little money. He delivers his kitbag to the concierge Henrik (Mogens Hermansen) before he was lured by accordion music and the laughter that comes to him from the "naughty" side of Nyhavn. In the Cafe "The black sails", he accidently joins Inger (Lisbeth Movin) at the same table, whose profession is not in the phone book, although it is the world's oldest. Inger is in the company of an unemployed stoker Vladimir W. Olsen (Poul Reichhardt) that is full of scams, and has a good mood.

A young woman of good family is driven into one of thieves and prostitutes and ends in suicide.

Director Max Kildal's private life has gone completely topsy-turvy. The two women of the house, his wife Louise and daughter Vibeke, throw him around in the ring when they play their rich girl intrigue game. Max is completely and utterly subject to the tyranny of women. At least for Max, no one is interested. And yet. One day he realizes that he is appreciated by his secretary - and then he shows his trump card to the women at home.

The story about Mr. Petit - a French charming marriage trickster and murderer of women.

A large city is in a state of panic, in workplaces and in homes people are discussing the terrible fate that has befallen a little girl named Birte. A sex offender has been at play, he has been haunting the city's parks and facilities for a long time, and his latest victim is Birte Elkær, daughter of the scientist Hans Elkær and his wife Martha. The police have deployed extra personnel, and they are now searching for the second day. Will the little girl be found alive?

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.'