After a valuable string of pearls is stolen from a rich banker, who later dies in a mysterious accident, his daughter Delia (Joan Perry) employs the reformed jewel thief Lanyard (Warren William) aka the Lone Wolf to recover them and find out what happened to her father.
A complicated romp ensues as the Lone Wolf impersonates a fence to infiltrate the criminal gang and switch the real pearls with fakes. However, an unexpected accomplice close to Delia threatens to derail the whole case...
This is a fine film, a typical B-movie with masses of plot squeezed into a short running time. There is some peril but everything is kept light and fast moving.
