A somewhat ditsy heiress named Cindy Conrad comes by Mannix' office one evening, complaining that a mysterious woman has been phoning her to offer important information about the death of Conrad's father several years before. Mannix correctly guesses that the caller wants a large sum of money to provide the information. He tries to convince Conrad to ignore the calls -- but he begins to believe that something is wrong when someone takes a shot at them as he is escorting Conrad to her car.
—aldanoli