Found dead of a gunshot in his locked bedroom, Herbert Wynne seems to have committed suicide. But Detective Inspector Patton has his doubts, so he hires nurse Hilda Adams to care for the elderly Juliet Mitchell, aunt of the deceased. You see, Patton likes to call Hilda "Miss Pinkerton," and he knows she will not only take good care of the patient, she's sure to sniff out the dark secrets hidden in the Mitchell mansion…and discover who really pulled the trigger. This clever and creepy classic from the Golden Age of mysteries still packs a punch!