The crux of this murder mystery involves a hot-headed Broadway diva who becomes so enraged when a woman attends her revue wearing an exact duplicate of the bizarre highly-distinctive hat she sports during an onstage musical number, that she immediately destroys the hat after the performance and later falsely tells police she would never wear anything but a one-of-a-kind creation, even though this misinformation (the theater-goer wearing the copy of the chapeau provided to be an alibi) will erroneously send a man to his death for a crime he didn't commit. In reality, police could have cleared up this point immediately had they simply questioned the show's costume designer or even checked the credits in the show's program to find the milliner who created it - performers never wear their personal wardrobes in elaborate musicals. Furthermore, the show in question was a long-running hit, suggesting there would have been publicity pictures of the star wearing the hat - or, if anyone had bothered to alert newspapers, thousands of theater-goers who could vouch they had indeed seen her wear it onstage during earlier performances.