Cheery little Pre-Code drama told mostly in flashback while Mary Martin awaits the jury’s decision in her murder trial. Turns out growing up poor, getting locked up for a crime you didn’t commit, becoming a “lady of the night” (hence the nickname), then falling in with gangsters can lead one down a dark path that ends in murder – but there are bright spots, too, like when Mary almost manages to leave her gangster boyfriend for a rich young gentleman who truly loves her.