The famous author Mark Storm's publisher is unhappy with his books and asks him to write books in a more popular genre, crime for example. When Mark Storm comes to his apartment, he finds a burglar, Kurre. He notices that they have a physical similarity and they change identity, which makes it possible for Storm to make empirical studies in the world of crime.
The Swedish officer Mikael Bourg has served with the French army in Africa. When he returns to Sweden after many years abroad to recover from malaria, he meets his son, a student who prefers partying with his frat friends instead of his bank job; a disappointment in his father's eyes. He also meets a young librarian, Ebba Garland, which makes him feel young again and distracts him from the sickness.
The young architect Gunnar Bergstrand marries the Norwegian Eva, against his parents' wishes.
Mr Wall needs a wife for a day to get a heritage from his aunt.
