With a stalker on the loose and the town of Siglufjoerdur in quarantine, a child goes missing, as Icelandic police officer Ari Thor Arason investigates a cold case of a mysterious death on an isolated fjord. 1955. Two young couples move to the uninhabited, isolated fjord of Hedinsfjoerdur. Their stay ends abruptly when one of the women meets her death in mysterious circumstances.

The case is never solved. Fifty years later an old photograph comes to light, and it becomes clear that the couples may not have been alone on the fjord after all... In nearby Siglufjoerdur, young policeman Ari Thor tries to piece together what really happened that fateful night, in a town where no one wants to know, where secrets are a way of life.

He's assisted by Isrun, a news reporter in Reykjavik, who is investigating an increasingly chilling case of her own. Things take a sinister turn when a child goes missing in broad daylight. With a stalker on the loose, and the town of Siglufjoerdur in quarantine, the past might just come back to haunt them.