"A film arrives at the National Criminal Investgation Department in Stockholm. It shows a woman, alive, being filmed through the window of her house. She does not know she is being watched. The police don't take it seriously. Until she is found dead. When the next video arrives, Detective Margot Silverman frantically searches for any way of identifying the victim. But it is already too late. Because at the time the video was sent, the subject was already facing the terrifying final moments of their life. And without anything to link the victims, the police are powerless to help them. Soon Stockholm is in the grip of terror. Who will the Stalker target next?"--Back cover.

"The Stockholm Police are sent a video of a woman being candidly filmed through her window. They conclude that in order to make the film, its creator must have been standing in the garden just outside. The next day the woman is found dead in her home, and the viciousness of her killing shocks even the most seasoned of the investigators called to the scene. A few days later, another clip is sent to the police. There is no way of identifying the woman before she, too, falls victim to a brutal attack. When the woman's husband finds her, he is so traumatized that in a state of panic, he starts scrubbing away the evidence of the violence that has invaded his home. Even washing the blood from his wife's body, he quietly puts her to bed, as if she were only sleeping. Chance is he has seen a clue vital to finding the killer, but the extreme shock has triggered a short-term memory loss and the police are unable to fully question him. Criminal psychiatrist and hypnotist Dr. Erik Maria Bark is called in to hypnotize the husband, hoping to unlock his memories of the murder scene. But what Dr. Bark uncovers in his sessions has him deciding to hide the truth from the police. It grows increasingly clear that the case cannot be solved without the help of Detective Inspector Joona Linna, the man who has been missing for more than a year and is presumed dead."--The Lars Kepler website.