This appears to be done to the usual successful template of Euro-Scandinavian thrillers but doesn't quite reach the mark.
The plot is a bit thin and feels slow even though things are happening at a reasonable pace, but the characters are suddenly introduced and not portrayed with any depth to become interesting, and we were left with a lack of involvement throughout. Then towards the end of episode 3 it turned towards ethinic superstition and magic, oh dear.
There's a continuous teaser sub-plot of the french detective as a young girl, and a mysterious young lad who arrives at her flat in Paris to her great shock. Unfortunately the reason behind the shock and the sub-plot is not shared with the viewer, so after a bit the "who cares" feeling sets in, and with everything else we just couldn't be bothered to continue to disc 2 and gave up on the series.
This is Nordic Noir with some differences, as it is based in northern Sweden and the plot comes from the culture clash between modern Swedish mining industry, criminals workers within that, and the Sammi people who inhabit the northern parts of Scandinavia. However, it follows the standard pattern of two apparently ill-matched investigators following up a vast array of clues and getting into unwise situations. The identity of the murderers is also revealed well before the end.
The pace is slow at first, you need patience but speeds up and culminates in a taut ending. The two leads make a good, contrasting pair and you can believe in them as outsiders thrown together. Perhaps too much is spent on her past and not enough on his.
A certain amount of disbelief has to be suspended. The plot is frankly rather far-fetched; and it seems that a regional prosecutor and a foreign police officer can roam around doing police work with zero involvement by the Swedish CID, who are mentioned only occasionally (though uniformed police do appear, usually in ways which do not show them in a good light). The involvement of shadowy figures from the French security service seems to be just a gesture, and the children of the leads are deeply annoying. But overall, worth watching.