A woman is brutally murdered in front of her young daughter, the sole witness to the crime. The challenging case is assigned to Detective Huldar, who must unravel a web of perplexing clues while dealing with a traumatized child who has been rendered mute. To help unlock the girl's memories, Huldar seeks the expertise of a child psychologist-only to discover it's Freyja, a woman he recently had an awkward date with. Forced to collaborate, Freyja and Huldar must race against time to stop a killer who strikes again and remains perilously close.

When the light breaks on a long summer's day in Iceland. From one sunset to another, Una, a young art student, encounters love, friendship, sorrow and beauty.

As Ódinn investigates decades-old deaths at a juvenile treatment centre, he begins to suspect that the sinister secrets he uncovers are connected to his ex-wife's mysterious suicide.