When his half-sister, Geraldine, goes missing, David Wheeler returns to his family's estate in Medvale with his new wife. His eccentric Aunt Faith enlists Iris Lloyd, a sixteen-year-old clairvoyant from the local girls’ home, hoping that her gift for “finding things” will reveal what happened. David, who secretly arranged Geraldine’s murder, initially dismisses Iris’s abilities, but he becomes unnerved after the teenage psychic attempts to seduce him and then begins producing uncanny insights about the fate of of his missing sister.