***SPOILERS*** It's when John Carter's, Richard Tucker, body was found in his study with a bullet in his head that the cop in charge of his murder investigation Oscar Piper, James Gleason, got help from a very expected, in that she helped him solve almost every case that he's been put on, spinster school teacher and armature sleuth Hildegarde Winters, ZaSu Pitts.
With Carter's maid Alice Stevens(Louise Latimer), who was the last person to be with him before he was murdered, as the prime suspect in her bosses murder Hildergarde uncovers a number of clues indicating that Carter was involved in a jewelry theft ring and was offed because he was holding out,in him not splitting the loot, on his fellow gang members. This leads to Hildergarde checking out this Cellini Cup at the New York Cosmopolitan Museum that held the famous Sultan Emerald,which she found hidden in Catrer's study, that was stolen out of the Paris Louvre Museum some 10 years ago.
The plot thickens when after getting the information about the Cellini Cup from museum security guard, who's an authority on the subject, Mr.Gordon, John Miltern, ends up not only murdered and thrown down a flight of stairs but the cup itself is stolen during all the confusion. It now becomes apparent that it wasn't Alice who had anything to do with Carters murder as Hildegarde always insisted but a gang of Jewel thieves who, with the museum now sealed off in not allowing anyone to leave, are now stuck in the museum! But the $64.00 question is who are they and how many?
****SPOILERS**** A bit of a confusing ending with Police Inspector Piper and Hildegarde tricking the Jewel thieves as well as murderers in exposing themselves with evidence, a fake homeless eye witness, that would have never held up in court. The best part of the movie was the exposer or appearance, wearing a mask, at the very end of the film of one of the members of the gang: The angry midget played by John T. Bambury in disguise as one of the schoolboys visiting, with his class, the museum. Despite Bambury not even being in the movie's credits he in fact stole all the acting, you never for a moment suspected he even had a mask on, honors in it.