In present-day Oslo, flashes of light in the ocean herald a shocking phenomenon: people from the past are appearing with no memory of how or why. From the Stone Age, the Viking Era, and the late 19th century, these “beforeigners” struggle to integrate into modern society - some adapting quickly, others clinging to the ways of their time.

When a woman with Stone Age tattoos is found murdered, burned-out detective Lars Haaland is forced to confront a world he doesn’t understand. He is partnered with Alfhildr Enginnsdottir, Oslo’s first multi-temporal police officer, whose Viking-era background makes her both invaluable and controversial. As they investigate, Lars and Alfhildr uncover chilling truths about the beforeigners, the fractures in society caused by their arrival, and the dangerous secrets lurking beneath Oslo’s streets.

A tense, high-concept thriller, Beforeigners explores what happens when the past collides with the present - and nothing is as it seems.