In 1933, in the pit of the Great Depression, a young, unemployed American chemical engineer decides to leave his home in California and walk to South America. A year later he fetches up in Bogota, Colombia, where he finds a job with a pharmaceutical firm, gets involved with coca and its derivatives, seduces a local girl and marries her. After attempting to sell his employer on promoting coca derivatives as proprietary drugs, he researches and eventually develops a method of combining coca with wine, as was done with Vin Mariani and other over-the-counter products of the 19th Century. Only his product is recoverable as cocaine.

With Repeal, he is able to export his product to Florida, where it is sold to a limited clientele of the wealthy in Palm Beach. Within three years he is rich, the owner of a 7,000-acre Colombian estancia, with friends among the influential German community in Colombia.

In 1936, accompanied by a German friend, he travels to Berlin for the Olympics. Near Munich they are houseguests of a friend of the German’s father, a party official who is overseeing construction at Berchtesgaden, Martin Bormann. Bormann is aware of the young Americans business, and blackmails him into supplying his product exclusively through Bormann to his patron and boss, Adolf Hitler. The American returns to Colombia, where he becomes Hitler’s dealer and, through this connection, is a party to some of the major South American events of World War II. He is pressured by the German ambassador, his paymaster, to help set up an underground railroad for sailors off the Graf Spee, interned in Argentina, to return to Germany. He is visited by U.S. Army Air Corps officers, posing as employees of Pan Am, who are secretly building at Natal, Brazil, the largest airfield in the world to transship American planes across the Atlantic narrows for the invasion of North Africa.

When Colombia enters the war in 1943, he loses contact with Bormann, only to be reconnected, through the Colombian German community, late in 1945. Bormann, alive, seeking refuge, is heading West from Spain aboard a Spanish freighter. The American, still under threat of blackmail, is supposed to meet him at an island off the Caribbean coast of Colombia, called Blackadore. The American heads for the island, the resolution of the story, and his destiny.

With Repeal, he is able to export his product to Florida, where it is sold to a limited clientele of the wealthy in Palm Beach. Within three years he is rich, the owner of a 7,000-acre Colombian estancia, with friends among the influential German community in Colombia.