It's 1943, and handsome young Charles Worthington is the chief of the American Office of Strategic Services in neutral Portugal. Because of its neutrality, Lisbon is the spy capital of wartime Europe. Spies from both sides mingle on the narrow cobblestone streets, the beaches, and at the famous Estoril Casino, in between nighttime meetings with agents, double agents, and simple conmen just trying to make a dollar, pound, or mark by selling bogus information to either side of the war. The closely guarded signals intercept program ULTRA has revealed that the Italian Embassy in Lisbon is somehow obtaining OSS secrets, and Charles is tasked by OSS director Wild Bill Donovan to stop that leak. While pursuing that investigation, he hears a rumor that German Abwehr chief, Admiral Canaris, is planning to smuggle Nazi gold through Portugal to Brazil and thus begins a second important investigation. Along the way, the lovely Russian NKVD intelligence officer Olga, whom he'd known in New York City before the war, reappears in his life, assisting his investigation but also greatly complicating his personal life. Weaved into this semifictional plot are the real-life spies Kim Philby, Ian Fleming, Duncan Lee, and British double agents Garbo and Tricycle. There is espionage, betrayal, murder, revenge, and love while searching for the gold-and it's still only Tuesday!