The local police chief Joubert (Harold Huber) enlists Chan's help after the murder of a courier carrying bonds, which is just as well as he is pretty hapless otherwise. The bonds are owned by Karnoff (Sidney Blackmer), who has a bitter rival in Savarin (Edward Raquello).
Karnoff's wife (Kay Linaker) meanwhile, is being blackmailed by the bartender Rogers (George Lynn) who indeed has had some of Karnoff's bonds. When Rogers winds up dead too, could Karnoff be the culprit or is it Karnoff's assistant Gordon (Robert Kent), who is mixed up with Savarin's female acquaintance Evelyn (Virginia Field)...
This is classic Charlie Chan fare. A complicated crime, the usual semi-comedic antics from the son, and cod-Chinese philosophy. Charlie Chan discovers the only clue that can uncover the true culprit. The Monte Carlo setting adds a bit of extra glamour to a wonderful little film.
