Suave and sophisticated Mick Sapphire is a lowlife bigamist and he’s blackmailing the President of the United States, but the president doesn’t know it. Mick’s demands got as far as the first lady and she called on veteran CIA agent Paul Snelling to handle it for her, telling him she wants it kept of the books. Her husband is not to know.
Sapphire has gone to ground somewhere, so Snelling is in Trinidad, watching his wife Joey, who lives on a sailboat in the Marina there. Also he’s hired contract agent Clay Clayton to track down Sapphire. Clayton finds Sapphire in Brazil where he’s just married a local girl. He tries to apprehend him, but Sapphire gets away and Clayton flies to Trinidad to report his failure to Snelling just in time to see the new wife show up and confront the old one.