Away Goes Prudence.

Prudence, a young society woman and aviatrix, is forbidden to continue flying by her fiancé Hewitt and her father. In defiance, she stages her own kidnapping, but Hewitt discovers the ruse and arranges a real abduction to teach her a lesson. His plan backfires, and the kidnappers rob him and capture Prudence. In order to save herself, Prudence pretends to join the gang.