In an affluent neighborhood on the outskirts of Oslo, Lisbeth Lind, a recently divorced mother of two is eating a perfectly normal breakfast, when she looks up to see a hand-drawn map stuck to her window. The map outlines the room she is standing in with a big red X, and
on the back, the paper is covered in dried blood. The next day, Lisbeth Lind is found dead in her own kitchen.

Years earlier, Robert Vågland is living in a high rise in the same neighborhood with his little sister and their sick, absent mother. Longing for his missing father, who, according to his mother, died in a shipwreck, he decides to follow in his father’s footsteps as a navigator and cartographer.

In our time, Lisbeth’s ex-husband Henrik also starts receiving mysterious maps, while his son Mikkel also starts receiving texts from his dead mother.

Detective John Persvik struggles to find a motive or the perpetrator, but when a local alcoholic who might have witnessed something the night of the murder comes forward, more possibilities come to light.