When an illegal African immigrant is shot and killed by police, Kerstin Holm is assigned the task of interviewing the police officer. He happens to be her ex-boyfriend Dag Lundmark, who then disappears without a trace during the investigation.

A Unit discovers a link between the shooting of an illegal African immigrant, bodies found in a marsh in Varmland and an apparent suicide. Kerstin Holm tries to track down missing police officer Dag Lundmark single-handedly. Suddenly she realises that he has come across a terrible secret and is just waiting for her to find him.