Katherine is agoraphobic: for the past three years she has been unable to set foot out of her own house. She believes she witnessed her husband die on the doorstep of their home from a gunshot wound. She is convinced that she spoke with an undercover detective before the body of her husband was removed, yet there is now no trace of either the body or the police officer. Jack Mize, a private investigator, is unsure about what to believe. When the husband shows up and declares his wife mentally unstable, Jack becomes convinced it's more than her sanity that's at stake; it's her very life.