We dare say that the plot here is secondary to all the garter-flashing and sideboob implications. A young girl discovers weed, gets knocked up, and becomes a desperate criminal. The young girl in question, named Burma for some reason, makes the fatal mistake of going to a beach party where marijuana (er, marihuana) rears its leafy head. It turns out to be a pretty eventful evening, as one girl drowns while Burma gets bun-in-ovenated by her boyfriend.
Being that this was the 1930s, this was an instant marriage sentence, so the both of them go to work for the local pot pushers to provide for their new family unit. Burma's boyfriend is soon killed during a deal gone sour, while she suffers the even more terrifying fate of facing the rest of her days as a lonely spinster. Well, she actually may have done alright for herself on that front, due to her skill at public skirt-lifting.
The opening crawl notes that the picture was "Made with the cooperation of the federal, state and police narcotics officials." This isn't the only case of this sort of movie, legitimately or not, claiming a partnership with the authorities. But it does seem like a good deal for everyone involved. The movies get some free credibility, while the police union halls receive some free spank material for bachelor parties.