A Professor comes home carrying a paper bag with food. Among the goods in the bag is apricot jam. His wife reacts strongly, since they always have eaten orange marmalade. The Professor leaves his house and checks into a hotel.
Nine people - three couples, one unmarried mother and two children - try to change and improve their lives by forming big families. Eva feels oppressed by her conventional parents. Vera and Lasse live with their daughter in a depressing suburb environment. Lena lives alone with her three-year-old son Pelle. Sven and Bibi live together in a small one-room apartment where they constantly quarrel. Sven sees the big family most as an opportunity for sexual experiments. A young French medical student, Paul, meets Bibi through common acquaintances and moves into the collective. The reason is simply that he has been attracted to Bibi. Meanwhile, Sven is increasingly interested in Lena.
To increase sales of the magazine Veckohatten, the management decides to invest heavily in the beauty contest Miss Sweden. A communist cell is planning to sabotage the competition, because it is sexist.
People on a train get murdered. Who is the murderer? Everybody on the train is a suspect. One of them is the homosexual dope fiend played by Heinz Hopf. Things might get out of hand in this exciting thriller in true Hitchcockian style.
The plot revolves around a sadistic doctor, a macabre gravedigger, an innocent girl, sabotage, sex and violent death. The beautiful Vivi Sander is living a rough life and is deeply in debt. She tries to force her family to sell the house to make ends meet. Vivi's car crash after a sabotage. She is injured and brought to a medical center where she meets the perverted Dr. Wester.
Fashion-designer May Berg is driving alone one evening, when she almost run over a man lying in the street. She gets out of the car to see. Suddenly the man attacks her, trying to strangle her. The assassination attempt fails, but it is followed soon by new, mysterious attempts to kill her. She is driven more and more into a constant fear of her life. Her husband trivialize the whole thing and even the police is skeptical of her claims that she is stalked by someone trying to kill her.
