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.

The rich young man Teddy Anker invests his money in the theater at the beginning of the 1920s. Whatever he does becomes a success. He falls in love with a dancer, Karin. He decides to put up a show with Karin as the leading lady, but for the first time one of his shows becomes an economic disaster.

A woman is driving alone one evening, when she almost run over a man lying in the road. She gets out of the car to see. Suddenly the man attacks her. Eva Jansson's dead body is found by a local farmer, who calls the police. Soon after fashion designer Maj Berg comes driving the same road and is stopped by the police. When the road is cleared for traffic Mrs. Berg drives on but happens to get a flat tire. While changing to the spare wheel, she finds a black notebook in the ditch. Back in Stockholm she opens the notebook and finds a strange jotting that concerns her.

Kalle Stropp, Grodan Boll and all their friends chasing Sotisarna, who has stolen Plåt-Niklas propeller.