This one's kind of similar to (but not as good as) the classic anti-marijuana flick REEFER MADNESS with depictions of how the evil weed with roots in hell (WILD WEED and THE DEVIL'S WEED are alternate titles) can turn a good gal (Lila Leeds) into a bad gal ("bad" by 1940's standards anyway). Of course it's all really silly but good for a laugh or two. Probably my favorite scene is when our main gal's goody-goody brother hangs himself in the garage because he can't deal with the shame of his sister smoking the wacky tobacco and hanging out with "dope-fiends".
More interesting than the actual film is the story behind it. It seems Miss Leeds was arrested for smoking pot in 1948 along with Robert Mitchum and due to this gained some dubious notoriety which resulted in her doing time, while Mitchum got away pretty much scott free, and ending up in this exploitation quickie which also ended up being her last film. This is pretty unfortunate since she seems like she coulda been great being the low-budget B-movie version of Marilyn Monroe but alas this was not to be, but we will always have this slice of silliness to remember Hollywood's hypocritical double-standard towards women at the time.
Looks like this played with legendary exploitation producer/distributor Kroger Babb's MOM AND DAD:
and for the nice price of 65 cents you could hear Lila tell her own sordid story on stage!: