Tom Lawrence (Tom Conway), known as the Falcon, is about to go on a fishing holiday with his sidekick Goldie Locke, with Goldie getting Tom to swear off thinking of women or crime. He breaks his vow when he sees a woman abducted in a taxicab. The Falcon rescues the damsel in distress, Louise Bragaza (Madge Meredith), and she tells him that she was the target of kidnappers due to her father's invention of a process to manufacture synthetic diamonds.