In 1994 two young twins are found brutally murdered in a summer cottage. A number of clues point in the direction of a group of young upper class students from a nearby boarding school, but the case is closed as a local outsider pleads guilty and is convicted for the murders. When the case ends up on Carl Mørck's desk 20 years later, he soon realises that something is terribly wrong. As Carl and Assad start investigating the case, they are led on to an old emergency call from a desperate girl, Kimmie, who seems to know the secrets of the murders. But Carl and Assad will have to contend with a group of influential men at the top of society who will do all they can to keep Kimmie silent.