When a commercial artist, her stockbroker husband, and their twin daughters move to Los Angeles, they unwittingly fall prey to a woman who convinces them that she is a psychic and can foresee their future. By persuading them that she holds the key to their success and can protect them from the dangers that threaten them, she gradually takes full control over their careers, their parenting, even their sex lives, until they become her willing accomplices. This chilling tale rises to a tense crescendo as the psychic dissects and manipulates the family's beliefs and paralyzes their will to protect themselves. This classic story of brainwashing offers a cautionary tale for anyone who has lost the ability to question an illogical certainty.