Katrine Bratterud is on the verge of finishing a spell in drug rehab. One evening celebrating her success at the shore of a lake she senses that she is not alone. In the dim early morning light she sees a naked man approaching from out of the woods . The discovery of Katrine's corpse the following day brings police officers Gunnarstranda and Frolich onto the case and into a world of secrets and lies that stretches back generations. Katrine's past as a prostitute makes her easy prey to a series of men, who immediately become suspects - and victims. In a world of secrets can the Oslo detectives find out the truth about these grisly murders in time before the killer strikes again . ?