Expert on body language and memory, and consultant to the Oslo Police, psychologist Kari Voss sleepwalks through her days, and, by night, continues the devastating search for her young son, who disappeared on his birthday, seven years earlier. Still grieving for her dead husband and trying to pull together the pieces of her life, she is thrust into a shocking local investigation, when two teenage girls are violently murdered in a family summer home. When a friend of the victims is charged with the barbaric killings, it seems the case is closed, but Kari is not convinced. With the help of Chief Constable Ramona Norum, she discovers that no one - including the victims - are what they seem. And that there is a dark secret that could have implications not just for her own son's disappearance, but Kari's own life, too. . .