After a private investigator friend dies in a car crash, Boston Blackie (Chester Morris) and The Runt (George E Stone) help out his widow to provide discreet protection of valuables at a fancy costume party (which gives Blackie yet another opportunity to don a disguise, though unfortunately he decides to black up!)
Of course, valuable pearls are stolen at the party and Boston Blackie gets the blame when Farraday (Richard Lane) turns up to investigate... On the run, Blackie and the Runt seek to discover the real thief, and of course there are a number of suspects.
A fine entry in the series, the penultimate film. Boston Blackie's ability to disguise himself is bought to the fore here, though how good these disguises are is another question though they certainly seems to fool everyone he meets! By now though we have seen the Boston Blackie set-up sufficient times that everything is a little too familiar but this is still an enjoyable film.
