"How crazy!" A man and a woman watch episodes from Nils Poppe movies outside a cinema Maxim in Stockholm. Poppe represents, among other things, a poor composer who vainly tries to get a tune adopted by a publisher. The failure makes him depressed, but he is living it up by meeting a good friend Calle, who invites him home. Poppe stays for a few days as a male housewife. Calle has a music store and there the two friends can go crazy among all the instruments.

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.

When an inspector is murdered in hospital, the investigation led by Detective Martin Beck uncovers reports of misconduct and possibly revenge.

When private eye John Hillman is on assignment in London his wife Kajsa visits the Army's riding school at Strömsholm, Sweden. She gets involved in the strange murder of the Blue Rider. Unknown to everyone at Strömsholm.

Baron Leijoncloo comes back to Sweden after many years in Argentina. On his way to his good friend Victor Sällberg's home, he loses his luggage. A con artist, Jönsson, finds it, and uses the baron's title to get invited to the manor of Mr. and Mrs. Blomqvist. By a coincidence, the baron also comes to the manor using a fake name. Plot by Mattias Thuresson.

Law graduate Ylva Markner spends the summer on the island of Väddö, where she gets involved in a quarrel concerning a last will.

The tailor Tosse is ordered to return to his old regiment to practice what he learned many years ago. But he asks his assistant Loffe to go there instead of himself. Everything is fine until Loffe gets the same order - at the same regiment. When Tosse comes to the regiment, it becomes a case of mistaken identity. Due to the confusion, Loffe is now Tosse's platoon commander. Plot by Mattias Thuresson.

A model is murdered at a famous fashion house and the Hillmans start to investigate. Kajsa Hillman is employed as a model and discovers that several people had motives to kill her.

A travelling theater-company performs Offenbach's "The Beautiful Helene" when an officer in the audience notices the similarity in appearance between the leading actor Leonard Pettersson and the king Charles XV. With Pettersson dressed as the king and the other actors as the royal suite, they all go to Herrsunda castle where the officer is trying to make an impression on his fiance.

Set on the island of Ven in the 1920s, Ellen is engaged with Per the sailor and waits for him while he is away at sea. She works as a maid in a rich family where Robert, the black sheep of the family, tries to seduce her. This leads to a rumour she has been unfaithful to Per. Plot by Mattias Thuresson.