Pharmaceutical researcher Dr. Marina Singh sets off into the Amazon jungle to find the remains and effects of a colleague who recently died under somewhat mysterious circumstances. But first she must locate Dr. Anneck Swenson, a renowned gynecologist who has spent years looking at the reproductive habits of a local tribe where women can conceive well into their middle ages and beyond. Eccentric and notoriously tough, Swenson is paid to find the key to this longstanding childbearing ability by the same company for which Dr. Singh works. Yet that isn’t their only connection: both have an overlapping professional past that Dr. Singh has long tried to forget. In finding her former mentor, Dr. Singh must face her own disappointments and regrets, along with the jungle’s unforgiving humidity and insects.