On a cold winter evening in a secluded fjord in Iceland, a neighbour visits the house of a family that has not been seen in a week. No one comes to the door when he knocks. After breaking down the back door, his worst fears are realised. Their home is now an horrific crime scene. Policeman Tyr and forensic pathologist Idunn are called to the house to investigate. As the case advances, harrowing secrets about the family are revealed. Along with a young policeman Karó, the investigative team quickly realise that the case forces them to face their own suppressed past and opens a Pandora's box to much darker crimes.