In the fall of 1992, James Sullivan travels to Vietnam to bicycle from Saigon to Hanoi. He has just finished graduate school and has an assignment to write a magazine story about a country that is still subject to a U.S. trade embargo. But in Hue, the old imperial capital of Vietnam, the planned three-month bike trip takes a detour. Here, in a city spliced by the famed Perfume River and filled with French baroque villas, he finds himself bicycling over a moat to visit a beautiful shop girl who lives amid the ruins of the last imperial dynasty of Vietnam. She falls for him, but there's a...