Eight year-old Lukas is found strangled with fishing line in a small stream in a suburb of Århus in the middle of a snowstorm. It looks like a sexual crime, but something does not fit into the picture as Lukas apparently has been in contact with fire.
Chief Inspector Daniel Trokic leads the investigation, but questions are mounting up. The police cannot find the place where Lukas was burnt. The parents are hiding something, but what? Who is the person captured on CCTV with Lukas the day, he disappeared. And what is the connection to a boy who drowned in the same stream 34 years ago?
Along with IT-specialist Lisa Kornelius Chief Inspector Daniel Trokic slowly opens the door to the darkness and finds a story holding much more evil than he first thought.