Hugh Bulldog Drummond (John Howard) is about to marry his great love, Phyllis, when the wedding has to be delayed.
One lovely wedding gift they received was a beautiful diamond, which turns out was created by the father of Phyllis' friend Gwen. He is very excited about presenting a paper at a conference and to be the first one who has created the gem. He's interested in credit, not money; in fact, he plans on giving the formula away.
At the party to celebrate the upcoming nuptials is Sir Raymond Blantree, a jewel magnate. He wants the formula and Gwen's father, Professor Goodman to sink the invention before it wrecks the value of jewels everywhere. The oil companies have done this for years with alternate fuel patents.
Professor Goodman isn't inclined to sell.
Everybody wants this formula, and in fact, a detective at the party is found murdered as a result of the diamond itself being stolen.
When Blantree finds out that Goodman is going to borrow equipment from a gemologist, Dr. Botulian, he devises a plan to steal the invention.Little does he know that Dr. Botulian has a plan of his own.
Well, this is where the movie goes off the rails. Blantree is having someone impersonate Dr. Botulian and show up at 9 p.m. Botulian himself plans on showing up earlier. Unfortunately I just couldn't tell who was who and before you knew it, I was totally confused.
John Howard is a dapper and charming Drummond, and Algy (Reginald Denny) and Tenney (E.E. Clive) are on hand to help him do what he can to catch the criminals.
Not on board and mad as hell and not going to take it anymore is the Colonel (John Barrymore) who is sick of Drummond's machinations. He's great. Phyllis (Louise Campbell), who thought her future husband was retiring, at one point tells him she never wants to see him again. We know she doesn't mean it.
Of course today we have all kinds of lab-created diamonds: Brilliant Earth, Moissanite, Affinity, etc. Brilliant Earth and Moissanite cost a fortune. I would have told Blantree, if you can't beat 'em, join 'em.
