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.
Åsa-Nisse is visited by cousin Doris from the United States. Nisse, Klabbarparn and Doris will travel to Stockholm, but Nisse and Klabbarparn lose track of Doris, who get into a hands of a Casanova. Nisse and Klabbarparn instead ends up at the Nordic Museum, where Åsa-Nisse turns out to have unexpected qualities in the art of imitating a mannequin. After that they had found each other is Doris robbed and it leads to a wild brawl that it sparkles and sputters on.
