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.
| Actor | Role |
|---|---|
 Eva RöseMaria Wern | Maria Wern |
 Allan SvenssonHartman | Hartman |
 Erik JohanssonSebastian | Sebastian |
 Peter PerskiArvidsson | Arvidsson |
 Ulf FribergEk | Ek |
 Tanja LorentzonErika | Erika |
| OOscar PetterssonEmil Wern | Emil Wern |
| MMatilda WännströmLinda Wern | Linda Wern |
| EEmma MelkerssonJennie | Jennie |
 Josephine AlhankoCamilla | Camilla |
 Peter EggersSimon | Simon |
| JJohn OlofssonUbbe | Ubbe |
 Per MattssonGunnar | Gunnar |
 Nina GunkeMirja | Mirja |
 Susan TaslimiFrida | Frida |
 Lena StrömdahlSigne | Signe |
 Johannes BrostLennart | Lennart |
| NNicke WagemyrWallner | Wallner |
 Johan BergPolis | Polis |
| AAnders EkedahlPolis | Polis |