Kata navigates a volatile scenario after an elderly man is found murdered.

Arnar returns to Iceland to help police with the two murders.

An elderly woman is found murdered.

Kata and Arnar look for a Valhalla employee who may be in danger.

Kata and Arnar are on the serial killer's track, but diversions lead them down a path never expected.

Ghosts from Arnar's past begin to haunt him again.

Kata continues her investigation into the Valhalla boys' home.

Arnar comes to Kata's rescue when she needs him the most.