Klaus Borowski is to question the German teenager Ralph Böttcher in Finland about an ongoing case. Böttcher, a 17-year-old former junkie, lives in a Finnish camp as part of a rehabilitation program and is said to have raped and murdered Anni, a girl from the neighboring village. He denies the crime, but is being held in a Finnish prison for investigation. When Borowski and his Finnish colleague Mikko want to transfer the boy to Helsinki together, they make a serious mistake: Ralph Böttcher knocks Borowski down, outwits Mikko and flees in his car and above all with his service weapon. Mikko, his colleague Tuulia and their boss Rane take up the pursuit and also investigate the case of the dead Anni again.
Borowski supports her together with his German colleague, the police psychologist Frieda Jung. She has traveled to help her colleague. But the investigations are going in circles - and at some point Borowski no longer knows what to believe. Insomnia, confusing feelings for Frieda Jung and this strange Finnish tango bring the Kiel commissioner to his limits...