Markham comes home to find an unconscious, rich heiress and her three armed kidnappers. The crooks demand $500,000 for her return and know that her father will contact Markham for help since he'd worked for the family before. Knowing that they'll be killed after the ransom is paid, Roy schemes to overtake their captors with a well-timed explosion.—Jay Phelps <jaynashvil@aol.com>