Policeman Týr and forensic pathologist Iðunn 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.

A box of photo albums is found in the attic of a house in Höfn, a small fishing village on the south coast of Iceland. The new owners return it to the man who sold them the house, along with a muddied child's shoe with a name written on the sole: Salvor. The man is baffled; they never knew anyone called that. Shortly after the phone rings - it's the nursing home where his mother, an Alzheimer's patient, lives. She's suffered a heart attack and the doctors don't expect her to live much longer. The nurse asks him to let his sister, Salvör, know as well. Their mother has been asking for her.