I love all those Swedish mini series impossible to find in the USA. My favorite was "the bridge", copied by the French (very good too) and the Mexican (boring).
But this Arne Dahl is one of the best. The team of policewomen and policemen has to solve a case, or two, and in the meantime, their family life suffers because they work 24/7.
I highly recommend it and I am so addicted I ordered season 2 yesterday!