Conservative executive Harold Pelham (a harrowing and atypical performance by Roger Moore) is involved in a car accident and declared momentarily dead. When he's eventually released from the hospital, Pelham discovers that an exact double of him has recently been seen in places that he's never been, taken over his family, undermined his business and even begun an extramarital affair. Is Pelham being stalked by a doppelganger with a taste for the wild life or is he simply a man going insane?