Well, I learnt something here. When I heard characters talking about "the larp" and "larping" when speaking Finnish and seeing this word translated into these same words in the English subtitles, I didn't have a clue what was going on. I had to stop the episode and use a translator to get the text in English. That didn't help as it just gave me "larp" in that language too. I asked google what it meant and it's an acronym for "live action role play". This was the basis of the plot - the original murder could only be solved by the larp that had led up to his death.
There were some twists and turns as well as false accusations. The scenario of an inbred island was good. The perversion of religion was also interesting - Finland has too many exclusive religious communities unfortunately that contrast with the overall liberalism of how society is viewed and works. I have to say it was rather over the top here dependant on one mentally deranged person.
A few things weren't followed up. What was Ulla Penttinen's background problem? How did Reijo's wife really die all those years ago?
I watched it all and thought it was fair. Not a masterpiece though as others are claiming.