 Holt's hunches lead him to the culprits and into trouble on a canoe ride and in an outlaw camp, as the action moves from the gang's hideout in a lost canyon to a gambling ship on the high seas to a small island country where the gang hopes to escape U.S. extradition.The brains heavy is a man named Lucky Arnold but he hides behind the facade of one of his loyal henchmen, Quist, to shield himself from the Secret Service, and lets another one of his men, Valden, do most of his dirty work.The island nation has its own pocket dictator who is also trying to rub out our hero.