A lady equipped at pulling off disguises (easier to blend in during black&white times -- before the world gained color) plans and executes some heists with the help of her trusty airship. The thefts don't amount to mastermind status, but rather fun little trickery with a few tools aside from costume changes.
It is a charming film albeit with some ridiculous scenes that might have been intentionally silly, or just due to the time period.
You probably won't laugh or cry, but a smile throughout is likely. This movie also reminds us how airships became the 8-track of the aviation world. That's a shame. We can handle hydrogen better now -- let's build some airships!