Hunter

After spending two years in one of Sweden's most secure prisons, Joona Linna is approached for a secret assignment. Saga Bauer needs him for an investigation that has the police completely stuck. A mysterious killer seems to be killing people at random; the only thing that connects them is the children's song they hear before the killer strikes.

Meanwhile, celebrity chef Rex Müller is looking forward to his son coming to stay with him for the first time. However, his joy is overshadowed when Rex himself suddenly becomes a suspect in the murder investigation. But then he receives a phone call in which the nursery rhyme is also played for him.