This bottom-of-the-barrel film starts before the credits with a Korean courier being killed for a map showing uranium deposits on a South Pacific island. Curtis, a former intelligence agent who is now a charter pilot, is persuaded by Holt, a federal agent, to help solve the case. The pilot
takes a group of people (a fraudulent countess, her secretary, and the secretary's brother, a mining engineer, etc.) by plane to a hotel in Death Valley. Here the hero gets clobbered on the head a couple of times, two people are murdered, and the map is passed around from one person to another.
Gibson is the local sheriff. Eventually, this muddled state of affairs gets straighten...