CLOSE THE CURTAINS.A film arrives at Stockholm’s National Crime Investigation Department showing a woman in her own home, plainly unaware she is being watched. The police don’t take it seriously … until she is found murdered.LOCK THE DOOR.When the next video arrives, Detective Margot Silverman frantically attempts to identify the victim. But it’s already too late. Because at the time the video was sent, the killer was already inside their house.BEFORE IT’S TOO LATE.Soon Stockholm is in the grip of terror. Who will the Stalker target next? .