Border Phantom (1937)

Cowboy Larry O'Day and his loyal partner Lucky Smith stumble upon a frantic Barbara Hartwell, unjustly accused of murdering her uncle. With Barbara locked up, Larry embarks on a mission to uncover the true culprit. His investigation leads him into a tangled web of deranged German entomologists and a smuggling operation trafficking Chinese "picture girls" across the Mexican border for affluent Chinese bachelors. As the stakes rise, Larry races against time to clear Barbara’s name and expose the dark underbelly of this criminal enterprise.