Dora moves in with the artist Erik to become his model. Three men from a Masonic Order pretends to be interested in his art, but Dora is their real focus.
Lund is home to Qvillander and Schorn. There is also a gentleman who lives entirely in the world of books, Professor Möbius. The latter is dominated by his aunt, Miss Lundén, who manages the finances of the house.
The waitress Monica goes to Västerköping to find out who actually was her father. By aunt Margareta, she has been told that her mother, who died at birth, had four admirers.