For a long time, a group of friends have been on a yearly summer trip to Laholm. This year, they want to go somewhere else, at least everyone except Ulf, who force the others to join the trip - by saying he has cancer.
A group of youngsters hanging out in an abandoned building encounter distressing circumstances.
In the middle of the Medieval fair in Visby the house of a 70-year-old woman is set on fire, and she is presumed dead. When another murder occurs Maria Wern and her police colleagues head for a picturesque summer town where everybody knows each other - and where the discovery of several Latin texts and incomprehensible drawings makes the police suspect that all the events have something to do with the medieval fair.
