This is a romantic, comic mystery. Warner Brothers turned out a lot of these in the thirties and early forties. Jane Wyman was often the girl.
Here, we have several girls. We have the secretary who appears out of nowhere. She works for a private investigator, Johnny Strange. (Was there another noun that could be added to Johnny to make a name for a movie character in that decade?) Then there's the mysterious veiled woman who calls for his services. Then there's Virginia Christine (Mrs. Olson of the coffee commercials a few decades later.) She sings in a club. Then there's ... OK: No more about the plot.
That excellent and durable actor Ricardo Cortez somehow found himself at Republic. He turns in a variation on his usual cynical, suave performance. It's not his worst, either. But he is fourth-billed, below William Frawley, who plays a cop. And Adele Mara gets top billing.
It's fun to watch. It could very easily have been better but it isn't terrible.