In the northeast corner of the Democratic Republic of the Congo, a ‘red zone’ remains, designated as such since the second war of the Congo, (1998–2002), where no foreigners have entered since 1999. The biologist Anne Laudisoit and her team of Congolese scientists embark upon a scientific exploration to identify species that dwell in one of the last virgin territories of Central Africa. In the lush yet inaccessible valleys of the Blue Mountains thrives an amazing startling biodiversity. Rumor has it that there are even chimpanzees.