At an exhibition of art and jewelry for the purpose of raising money for war funds, the most valuable of all pieces, a huge diamond, is mysteriously stolen - so what does Inspector Faraday tell the reporters to print? That Boston Blackie did the 'job'! But why? To get him to help the police solve the case!!
Now that's a new one, Blackie with a police badge in his pocket - but the rest is more or less familiar: the most hilarious chases, the most daring escapes - and two dumb flatfoots playing cards for an hour right next to the two thieves who are posing as dummies in a store!
Good, solid, and clever entertainment as always by Blackie with the thousand faces (this time Chester Morris impersonates an elderly professor, for instance, with the greatest credibility!), his friend the Runt, and the whole bunch of stupid policemen; and not a dull moment!