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Perry (Raymond Burr) receives an envelope containing $500 from Marian Fargo (played by a redheaded Angie Dickinson), who wants him to exchange the money for documents pertaining to her brother, a fugitive from justice. Things get sticky when the "drop-off" point turns out to be a murder scene. Compelled to clear Marian of charges that she killed not only a blackmailer named Renault (Jan Arvan) but her own husband Arthur (Peter Adams), Perry must rely upon a witness (Dorothy Green) whose eyesight is very seriously impaired--and who may have a hidden agenda of her own. (In an unintentionally amusing scene, Perry complains that the coffee in an expensive French restaurant costs an outrageous one dollar per cup!)