 What s the difference between a primitive (such as Hopi Indians or Richard Marshall the Fifth s two-fisted pioneer ancestors) and a sophisticate (in this case Richard Marshall V, raised in Monte Carlo playing polo in spats and a monocle)? Richard meets up with some Americans abroad who can t believe he s an American too. He s invited to sail with them to Galveston and then head for Hopi land in Arizona. Little does Richard know that he s stumbled onto a diamond-smuggling operation, that one of the yachting party is in the secret service on the trail of Van Holkar, their host, and that soon all of Richard s instinctual mettle will be tested, mettle he didn t know he had.