After his father is killed in a car accident, things unravel for Kale Brecht and he is placed under house-arrest for punching his Spanish teacher. Having nothing better to do, Kale occupies himself by spying on his neighbors. But one night, he witnesses what appears to be a murder going on in Mr. Turner's house. Kale becomes obsessed with uncovering the truth behind these murders but, after a few unsettling run-ins with Mr. Turner, it becomes a matter of life and death. And the ominous question: Who is watching whom?

Jerry Shaw is an amiable slacker with an over-achieving twin brother. After his twin dies in an accident, strange things happen to Jerry at a dizzying pace: a fortune shows up in his bank account, weapons are delivered to his flat, and a voice on his cell phone tells him the police are on their way. Jerry follows the voice's instructions, and soon he and a woman he's never met are racing through the city, on to a plane, and eventually to the Pentagon, chased by the FBI. She is Rachel Holloman, a single mom; the voice has threatened her son's death if she doesn't cooperate. The voice seems to know everything. Who is behind it, what is being planned, and why Jerry and Rachel?

The film starts in the early 1980s. Young Martin Asher took a bus for Canada. He meets another teen on the bus Matt Soulsby. When the bus broke they decided to rent a car and drive to Seattle. On the road the car gets a flat tire, and Matt starts changing the tire Martin comments on how he and Matt are about the same height and he quickly pushes Matt in the way of an oncoming truck causing a huge accident where Matt and the driver both die. He took Matt's guitar and left singing like Matt did. Twenty years later, an FBI profiler, Illeana Scott comes to Canada to help hunting down a serial killer Martin Asher who killed multiple men and lived by their identities. Martin's mother claims that she saw Martin in Quebec city and she tells the police that Martin is evil. The police also has an eyewitness James Costa who saw Asher kill his last victim...