AdÔelie Tremier, a young widow suffering the final stages of tuberculosis, flees for French-occupied Indochina, through the lush forests of Laos, to seek out a fabled spring of immortality that might allow her to return to her nine-year-old son. Laos, 1936: Pierre Lazarie, a young academic turned Saigon bureaucrat, is sent by AdÔelie’s son, now an Army captain, to find his longlost mother. Although his assigned quest fulfills Pierre’s fantasy to travel up the exotic Mekong, he is saddled with his colleague Henri LeDallic, an Indochina old-timer who would rather glory in his loutish past than hunt for ghosts in the jungle.