English anthropologist Andrew Banson has been alone in the field for several years, studying the Kiona river tribe in 1930s New Guinea. Haunted by the memory of his brothers' deaths and increasingly frustrated and isolated by his research, Bankson is on the verge of suicide. Then he encounters the famous and controversial American anthropologist Nell Stone and her wry and mercurial Australian husband, Fen, who have just fled the bloodthirsty Mumbanyo....