The trail began in Rio de Janeiro...
Two beautiful girls had been killed in a mysterious car wreck near Rio, and a large number of people seemed determined to discourage any investigation of the accident. Since the girls were U.S. citizens, the FBI became interested...and they quickly alerted U.N.C.L.E.

When Napoleon Solo and Illya Kuryakin finally uncovered the secret hidden in the wilds of Brazil, it was only the beginning of their mission. For now they faced a fantastic plot that could destroy the world...and the countdown to disaster had already started!