The race of the wealthy Gordon family in their crack yacht, "The Yankee Girl," to close an option on a valuable copper concession in Latin America and the political intrigue of the desperate James Seavey of the rival Pacific Copper crowd to prevent their arriving on time culminates when the quick-witted Jessie Gordon braves old President Ambroce Castroba, whom Seavey has bought out, in his own palace. The breezy blarney of the pretty North American girl goes to Castroba's head, as does the champagne she fools him into thinking she is drinking with him, and he forgets his agreement with Seavey and accepts the $5,000 first payment on the copper property, even lending her, to make it up, $50 which she had to pay one of his grafting customs officers. But before the transaction can be binding another final payment of $60,000 must be made in twenty-four hours, and Seavey redoubles his sinister efforts to frustrate it.