The murdered law student Sophie Naess turns out to have also been a high-class prostitute working with Karina Urdahl. The detectives locate Karina and her pimp Remi. As they wait to make the bust, the two men bond. Sander explains that Bo’s brain injury comes from an immigrant brutally attacking Bo back in high school. The detectives take Karina and Remi into custody, finding an underage immigrant girl hidden in the house. That night, long-time family friend Marit tells Sander that Bo was mentally disabled before the attack in high school; he’s been brain damaged since birth.