As Kari and family wrestle with devastating news, Heikkinen calls to ask for help with a kidnapping case and Katia stands trial for attempted murder.

Over Niko's objections, Kari dives into a series of grisly crimes that yield more echoes of past cases.

As the team races to track down potential victims, Kari scours the country for news of the killer's daughter.

When a retirement home resident is murdered, Kari and the team question the victim's three sons and his much younger girlfriend.

Kari grapples with his own father issues.

After another key figure in the case is found dead, Kari revisits a suspicious tragedy in the family's past.

The ritualistic murder of a swimming instructor takes the team to a conservative religious community full of secrets.

Shocking news and an unsettling encounter stoke tensions in the community.

Kari is locked down in a hospital ward during a mysterious outbreak, as he and the team brace for the return of Lasse Maasalo.

Anneli faces an ultimatum; Kari must decide how far he's willing to go to stop his nemesis.