A federal agent is sent to a small town to bust up a counterfeiting ring, which is apparently headquartered in the local railway station. The counterfeiters have framed the station's manager for the crime, and she must work with the agent to clear her name and get the goods on the real counterfeiters.
Beau Nash is a "gentleman crook" who headquarters his gang of jewel thieves in a run-down boardinghouse. When one of his gang, Mike, gets arrested, his sister Claire--aka "Lady Byron"--swears to get revenge. The gang frames Donald, the best friend of the detective who arrested Mike, for a jewelry store robbery. The detective gives Donald--and his new love, Claire--a short time to find the thieves and clear his name before he takes him in.