Dope runner Hervey Stanton has a unique method of smuggling heroin into the U. S. by a parachutist. McKeever signs on to jump for the smugglers in order to find out who receives the heroin.

Ted McKeever and Jim Buckley answer the "Mayday" of a gangster when the fugitive's plane makes a forced landing near the Mexican border. Gangster Louis Santee and his wife are fleeing toward the Mexican border one jump ahead of Senate investigators.