Is this Swedish movie out on DVD or such over in the UK? It screened theatrically here (Sweden) for a few weeks before vanishing to dvd. Giallo fans may want to check it out as it defiantly uses a hand full of genre traits - and a line of dialogue is a direct reference to Argento's Four Flies on Grey Velvet.
Here's a link to more about the movie, and as said - it's worth checking out...
http://cinezilla.blogspot.com/2011/03/ond-tro.html