It looks like Bulldog (John Howard) is getting married to Phyllis (Louise Campbell) and giving up the detecting racket. One of the wedding gifts is an artificial or man-made diamond. Naturally, this is seen by a diamond mine owner, Sir Raymond Blantyre (Matthew Boulton.) He realized his economy is in peril. The diamond and Sir Raymond go missing and there is a body left behind. It does not take long to figure out what happened. From here things get crossed and double-crossed. There are explosive scenes and goofy chase scenes. Col. Neilson (John Barrymore) of Scotland Yard is after Captain Drummond for his indiscretions and only confuses things.
The whole film is pretty much Drummond formula (screenplay by Stuart Palmer and based on "The Third Round" by H. C. (Snapper) McNeile) but there is no spark among the characters or satisfaction in the chases or discoveries or conclusions.
The whole film is pretty much Drummond formula (screenplay by Stuart Palmer and based on "The Third Round" by H. C. (Snapper) McNeile) but there is no spark among the characters or satisfaction in the chases or discoveries or conclusions.