[3] Season 1 – In August 1990, the sadistic murder of a pregnant woman is committed on the island of Nordkoster, western Sweden.
Olivia Rönning, a trainee at the Stockholm Police Academy, is assigned the cold case for a summer project.
Horrifying videos show up on the Internet in which other homeless people are brutally attacked including a friend of Tom's.
They are thwarted by Rune Forss, a corrupt policeman and by Jackie Berglund, a former prostitute, madame and current store owner.
Season 2 – In late 2017 Olivia's near neighbour, Bengt Sahlman, is found hanging in his home by his teenage daughter, Sandra.
They pursue Jean Borrel, the owner of Albion, which recommended a dangerous medicine to aged care homes, leading to deaths that were covered up; including that of Bengt's father.