Capt. Hugh "Bulldog" Drummond (John Howard) pops the question to Phyllis (Louise Campbell)─what, again?─but when a missing synthetic diamond turns up as a wedding gift, their pleasure is put aside for his business. However, trying to foil the killer who has left a trail of bodies behind to possess the gem could make Phyllis a widow before the vows are exchanged! John Barrymore, Reginald Denny co-star. 67 min. Standard; Soundtrack: English.