From IMDB:

Police profiler Arnar is sent back home from Oslo to his native Iceland to investigate the country’s first serial killer case. He teams up with the local senior cop Kata.

From Netflix you can stream the 8 episodes of this Norwegian detective series. Each episode lasts about 45 minutes.

Orphanages in which the boys are sexually molested is a theme that has been used several times in other dramas.  In that sense there is a sameness to this series that seems a bit copycat. It takes 8 episodes to find the predator, deal with police bureaucracy,  and fight a conspiracy to cover up the murders and rapes.  Expect at times to suspend disbelief:  injured cops heroically save lives,  TV commentators miraculously save the day, etc.  Sometimes I am happy that a too convenient solution relieves the tension.

Along the way the divorced Kata has trouble with her son while the unusually taciturn Arnar must fight his own personal demons.

Despite any flaws, the clever obstacles created by the bad guys, the personal stories, and the action sequences kept me glued.