Regarding to tv.nu we have a description of the first episode “Madeleine” Part one and two:

S10:A1 Season Start. Madeleine, part 1. A few months have passed since the bombing of the police station. At the nursing home where a police officer is being rehabilitated, the staff make a horrific discovery. An acquaintance returns from the dead and Nora is drawn into the investigation in an unexpected way.

S10:A2 Madeleine, part 2. The traces of the murder lead into a world where nothing is what it seems and where old debts must be paid. After everything that has happened, Nora wants to move on in life, but one of her closest people makes a decision that has major consequences.