There were many, many B-detective series films through the 1930s and 40s--ranging from Sherlock Holmes to Ellery Queen to Charlie Chan to The Falcon--and many, many more. Despite the wide variety, these film are quite similar and the plots are rather interchangeable. However, I always look forward to a Hildegarde Withers film starring Edna May Oliver, as her films, regardless of the plot, have a lot more going for them than the rest of the pack. That's because Ms. Oliver was simply a delight to watch--as her detective was given the snappiest and most sarcastic dialog and her delivery was always wonderful. While she appeared at first much like a Jessica Fletcher-style character, you soon discovered she wasn't so cuddly or sweet and was more of a "dame" in the best sense of the word.
This particular film is about a dead body that is discovered but then disappears at a school. Later, the body is found in the most grisly fashion and it's up to Miss Withers and her sidekick, the Inspector (James Gleason) to solve the crime. The film isn't quite as good as their previous film, THE PENGUIN POOL MURDER and interestingly enough they actually refer back to that case--something you don't often see in these films. Watch it--it's exciting, funny and different.
Sadly, despite the higher than usual quality of these films, Ms. Oliver only made three and the studio tried replacing her with Helen Broderick and Zasu Pitts--pale imitations of the original.