After an armed robbery attempt on their suburban home, a young couple (Kurt Russell and Madeleine Stowe) do what anyone would do - they call the police. That's when they meet Los Angeles Policeman Pete Davis (Ray Liotta) and immediately warm up to his caring and sensitive attitude. He makes the couple's safety his personal concern, and begins frequent patrols of their property. But this friendship turns into a twisted obsession as Davis's relationship with the couple develops and forces his way into their lives. Plunged into a nightmare where protector becomes predator, the couple must somehow escape from the web of security that has become their ultimate enemy.