Thomas Fowler is a British journalist in his fifties who has covered the French war in Vietnam for more than two years. He meets a young American idealist named Alden Pyle, a CIA agent working undercover. Pyle lives his life and forms his opinions based on foreign policy books written by York Harding with no real experience in Southeast Asia matters. Harding's theory is that neither communism nor colonialism are proper in foreign lands like Vietnam, but rather a "Third Force"—usually a combination of traditions—works best. When they first meet, the earnest Pyle asks Fowler to help him understand more about the country, but the older man's cynical realism does not sink in. Pyle is certain that American power can put the Third Force in charge, but he knows little about Indochina and is recasting it into theoretical categories.